King Vulture
Encyclopedia
The King Vulture is a large bird
Bird
Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...

 found in Central
Central America
Central America is the central geographic region of the Americas. It is the southernmost, isthmian portion of the North American continent, which connects with South America on the southeast. When considered part of the unified continental model, it is considered a subcontinent...

 and South America
South America
South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

. It is a member of the New World vulture
New World vulture
The New World Vulture or Condor family Cathartidae contains seven species in fivegenera, all but one of which are monotypic. It includes five vultures and two condors found in warm and temperate areas of the Americas....

 family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 Cathartidae. This vulture lives predominantly in tropical lowland forests stretching from southern Mexico
Mexico
The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

 to northern Argentina
Argentina
Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

, though some believe that William Bartram's
William Bartram
William Bartram was an American naturalist. The son of Ann and John Bartram, William Bartram and his twin sister Elizabeth were born in Kingsessing, Pennsylvania, near Philadelphia. As a boy, he accompanied his father on many of his travels, to the Catskill Mountains, the New Jersey Pine Barrens,...

 Painted Vulture of Florida
Florida
Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

 may be of this species. It is the only surviving member of the genus Sarcoramphus, although fossil members are known.

Large and predominantly white, the King Vulture has gray to black ruff, flight, and tail feather
Feather
Feathers are one of the epidermal growths that form the distinctive outer covering, or plumage, on birds and some non-avian theropod dinosaurs. They are considered the most complex integumentary structures found in vertebrates, and indeed a premier example of a complex evolutionary novelty. They...

s. The head and neck are bald, with the skin color varying, including yellow, orange, blue, purple, and red. The King Vulture has a very noticeable yellow fleshy caruncle
Wattle (anatomy)
A wattle is a fleshy dewlap or caruncle hanging from various parts of the head or neck in several groups of birds, goats and other animals. In some birds the caruncle is erectile tissue.The wattle is frequently an organ of sexual dimorphism...

 on its beak. This vulture is a scavenger and it often makes the initial cut into a fresh carcass. It also displaces smaller New World vulture species from a carcass. King Vultures have been known to live for up to 30 years in captivity.

King Vultures were popular figures in the Mayan codices as well as in local folklore and medicine. Although currently listed as Least Concern by the IUCN, they are decreasing in number, due primarily to habitat loss.

Taxonomy and systematics

The King Vulture was originally described by Carl Linnaeus in 1758 in the tenth edition
10th edition of Systema Naturae
The 10th edition of Systema Naturae was a book written by Carl Linnaeus and published in two volumes in 1758 and 1759, which marks the starting point of zoological nomenclature...

 of his Systema Naturae
Systema Naturae
The book was one of the major works of the Swedish botanist, zoologist and physician Carolus Linnaeus. The first edition was published in 1735...

as Vultur papa, the type specimen originally collected in Surinam. It was reassigned to the genus Sarcoramphus in 1805 by French zoologist André Marie Constant Duméril
André Marie Constant Duméril
André Marie Constant Duméril was a French zoologist. He was professor of anatomy at the Muséum National d'Histoire Naturelle from 1801 to 1812, when he became professor of herpetology and ichthyology...

. The generic name is a New Latin
New Latin
The term New Latin, or Neo-Latin, is used to describe the Latin language used in original works created between c. 1500 and c. 1900. Among other uses, Latin during this period was employed in scholarly and scientific publications...

 compound formed from the Greek
Ancient Greek
Ancient Greek is the stage of the Greek language in the periods spanning the times c. 9th–6th centuries BC, , c. 5th–4th centuries BC , and the c. 3rd century BC – 6th century AD of ancient Greece and the ancient world; being predated in the 2nd millennium BC by Mycenaean Greek...

 words σάρξ (sarx, "flesh", the combining form of which is σαρκο-) and ῥάμφος (rhamphos, "crooked beak of bird of prey"). The genus name is often misspelled as Sarcorhamphus, improperly retaining the Greek rough breathing despite agglutination
Agglutination
In contemporary linguistics, agglutination usually refers to the kind of morphological derivation in which there is a one-to-one correspondence between affixes and syntactical categories. Languages that use agglutination widely are called agglutinative languages...

 with the previous word-element. The bird was also assigned to the genus Gyparchus by Constantin Wilhelm Lambert Gloger
Constantin Wilhelm Lambert Gloger
Constantin Wilhelm Lambert Gloger was a German zoologist and ornithologist.Gloger was the first person to recognise the structural differences between swallows and swifts, and also the first to put up artificial bat boxes.He was the originator of Gloger's rule, which states that dark pigments...

 in 1841, but this classification is not used in modern literature since Sarcoramphus has priority as the earlier name. The species name is derived from Latin
Latin
Latin is an Italic language originally spoken in Latium and Ancient Rome. It, along with most European languages, is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the Christian clergy speak it fluently, and...

 word papa "bishop", alluding the bird's plumage resembling the clothing of one. The King Vulture's closest living relative is the Andean Condor
Andean Condor
The Andean Condor is a species of South American bird in the New World vulture family Cathartidae and is the only member of the genus Vultur...

, Vultur gryphus. Some authors have even put these species in a separate subfamily from the other New World vultures, though most authors consider this subdivision unnecessary.

There are two theories on how the King Vulture earned the "King" part of its common name. The first is that the name is a reference to its habit of displacing smaller vultures from a carcass and eating its fill while they wait. An alternative theory reports that the name is derived from Mayan
Maya civilization
The Maya is a Mesoamerican civilization, noted for the only known fully developed written language of the pre-Columbian Americas, as well as for its art, architecture, and mathematical and astronomical systems. Initially established during the Pre-Classic period The Maya is a Mesoamerican...

 legends, in which the bird was a king who served as a messenger between humans and the gods. This bird was also known as the "White Crow" by the Spanish
Spain
Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

 in Paraguay
Paraguay
Paraguay , officially the Republic of Paraguay , is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to the east and northeast, and Bolivia to the northwest. Paraguay lies on both banks of the Paraguay River, which runs through the center of the...

. It was called cozcacuauhtli in Nahuatl
Nahuatl
Nahuatl is thought to mean "a good, clear sound" This language name has several spellings, among them náhuatl , Naoatl, Nauatl, Nahuatl, Nawatl. In a back formation from the name of the language, the ethnic group of Nahuatl speakers are called Nahua...

, derived from cozcatl "collar" and cuauhtli "bird of prey".

The exact systematic
Systematic
Systematic is an American hard rock band from Oakland, California. They were one of the first signings to Metallica drummer Lars Ulrich's record label, The Music Company, via Elektra Records. The band released two studio albums before disbanding in 2004....

 placement of the King Vulture and the remaining six species of New World vulture
New World vulture
The New World Vulture or Condor family Cathartidae contains seven species in fivegenera, all but one of which are monotypic. It includes five vultures and two condors found in warm and temperate areas of the Americas....

s remains unclear. Though both are similar in appearance and have similar ecological roles
Ecological niche
In ecology, a niche is a term describing the relational position of a species or population in its ecosystem to each other; e.g. a dolphin could potentially be in another ecological niche from one that travels in a different pod if the members of these pods utilize significantly different food...

, the New World and Old World vultures evolved from different ancestors in different parts of the world. Just how different the two are is currently under debate, with some earlier authorities suggesting that the New World vultures are more closely related to storks. More recent authorities maintain their overall position in the order Falconiformes
Falconiformes
The order Falconiformes is a group of about 290 species of birds that comprises the diurnal birds of prey. Raptor classification is difficult and the order is treated in several ways.- Classification problems :...

 along with the Old World vultures or place them in their own order, Cathartiformes. The South American Classification Committee has removed the New World vultures from Ciconiiformes
Ciconiiformes
Traditionally, the order Ciconiiformes has included a variety of large, long-legged wading birds with large bills: storks, herons, egrets, ibises, spoonbills, and several others. Ciconiiformes are known from the Late Eocene...

 and instead placed them in Incertae sedis
Incertae sedis
, is a term used to define a taxonomic group where its broader relationships are unknown or undefined. Uncertainty at specific taxonomic levels is attributed by , , and similar terms.-Examples:*The fossil plant Paradinandra suecica could not be assigned to any...

, but notes that a move to Falconiformes or Cathartiformes is possible. Like other New World vultures, the King Vulture has a diploid chromosome number of 80.

Fossil record and evolution

The genus Sarcoramphus, which today contains only the King Vulture, had a wider distribution in the past. The Kern Vulture (Sarcoramphus kernense), lived in southwestern North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

 during the mid-Pliocene
Pliocene
The Pliocene Epoch is the period in the geologic timescale that extends from 5.332 million to 2.588 million years before present. It is the second and youngest epoch of the Neogene Period in the Cenozoic Era. The Pliocene follows the Miocene Epoch and is followed by the Pleistocene Epoch...

 (Piacenzian
Piacenzian
The Piacenzian is in the international geologic timescale the upper stage or latest age of the Pliocene. It spans the time between 3.6 ± 0.005 Ma and 2.588 ± 0.005 Ma...

), some 3.5–2.5 million years ago). It was a little-known component of the Blancan
Blancan
The Blancan North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology , typically set from 4,750,000 to 1,808,000 years BP, a period of .. It is usually considered to start in the early-mid Pliocene epoch and end...

/Delmontian faunal stage
Faunal stage
In chronostratigraphy, a stage is a succession of rock strata laid down in a single age on the geologic timescale, which usually represents millions of years of deposition. A given stage of rock and the corresponding age of time will by convention have the same name, and the same boundaries.Rock...

s. The only material is a broken distal humerus
Humerus
The humerus is a long bone in the arm or forelimb that runs from the shoulder to the elbow....

 fossil
Fossil
Fossils are the preserved remains or traces of animals , plants, and other organisms from the remote past...

, found at Pozo Creek, Kern County, California
Kern County, California
Spreading across the southern end of the California Central Valley, Kern County is the fifth-largest county by population in California. Its economy is heavily linked to agriculture and to petroleum extraction, and there is a strong aviation and space presence. Politically, it has generally...

. As per Loye H. Miller's original description, "[c]ompared with [S. papa] the type conforms in general form and curvature except for its greater size and robustness." The large span in time between the existence of the two species suggests that the Kern Vulture might be distinct, but as the fossil is somewhat damaged and rather non-diagnostic, even assignment to this genus is not completely certain. During the Late Pleistocene
Late Pleistocene
The Late Pleistocene is a stage of the Pleistocene Epoch. The beginning of the stage is defined by the base of the Eemian interglacial phase before the final glacial episode of the Pleistocene 126,000 ± 5,000 years ago. The end of the stage is defined exactly at 10,000 Carbon-14 years BP...

, another species probably assignable to the genus, Sarcoramphus fisheri, occurred in Peru
Peru
Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....

. A supposed King Vulture relative from Quaternary
Quaternary
The Quaternary Period is the most recent of the three periods of the Cenozoic Era in the geologic time scale of the ICS. It follows the Neogene Period, spanning 2.588 ± 0.005 million years ago to the present...

 cave deposits on Cuba
Cuba
The Republic of Cuba is an island nation in the Caribbean. The nation of Cuba consists of the main island of Cuba, the Isla de la Juventud, and several archipelagos. Havana is the largest city in Cuba and the country's capital. Santiago de Cuba is the second largest city...

 turned out to be bones of the eagle
Eagle
Eagles are members of the bird family Accipitridae, and belong to several genera which are not necessarily closely related to each other. Most of the more than 60 species occur in Eurasia and Africa. Outside this area, just two species can be found in the United States and Canada, nine more in...

-sized hawk
Hawk
The term hawk can be used in several ways:* In strict usage in Australia and Africa, to mean any of the species in the subfamily Accipitrinae, which comprises the genera Accipiter, Micronisus, Melierax, Urotriorchis and Megatriorchis. The large and widespread Accipiter genus includes goshawks,...

 Buteogallus borrasi
Buteogallus borrasi
Buteogallus borrasi is an extinct species of giant buteonine hawk formerly endemic to Cuba. It probably fed on megafauna.It was so huge compared to other Buteogallus that it was long believed to be a titan-hawk or even an Aquila eagle. No proper common name exists due to this misconception...

(formerly in Titanohierax).

Little can be said of the evolution
Evolution
Evolution is any change across successive generations in the heritable characteristics of biological populations. Evolutionary processes give rise to diversity at every level of biological organisation, including species, individual organisms and molecules such as DNA and proteins.Life on Earth...

ary history of the genus, mainly because remains of other Neogene
Neogene
The Neogene is a geologic period and system in the International Commission on Stratigraphy Geologic Timescale starting 23.03 ± 0.05 million years ago and ending 2.588 million years ago...

 New World vultures are usually younger or even more fragmentary. The teratorns held sway over the ecological niche
Ecological niche
In ecology, a niche is a term describing the relational position of a species or population in its ecosystem to each other; e.g. a dolphin could potentially be in another ecological niche from one that travels in a different pod if the members of these pods utilize significantly different food...

 of the extant group especially in North America. The Kern Vulture seems to slightly precede the main bout of the Great American Interchange
Great American Interchange
The Great American Interchange was an important paleozoogeographic event in which land and freshwater fauna migrated from North America via Central America to South America and vice versa, as the volcanic Isthmus of Panama rose up from the sea floor and bridged the formerly separated continents...

, and it is notable that the living diversity of New World vultures seems to have originated in Central America
Central America
Central America is the central geographic region of the Americas. It is the southernmost, isthmian portion of the North American continent, which connects with South America on the southeast. When considered part of the unified continental model, it is considered a subcontinent...

. The Kern Vulture would therefore represent a northwards divergence possibly sister to the S. fisheri – S. papa lineage. The fossil record, though scant, supports the theory that the ancestral King Vultures and South American Condors separated at least some 5 mya.

Bartram's "Painted Vulture"

A "Painted Vulture" ("Sarcoramphus sacra" or "S. papa sacra") is described in William Bartram
William Bartram
William Bartram was an American naturalist. The son of Ann and John Bartram, William Bartram and his twin sister Elizabeth were born in Kingsessing, Pennsylvania, near Philadelphia. As a boy, he accompanied his father on many of his travels, to the Catskill Mountains, the New Jersey Pine Barrens,...

's notes of his travels in Florida
Florida
Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

 during the 1770s. This bird's description matches the appearance of the King Vulture except that it had a white, not black, tail. Bartram describes the bird as being relatively common and even claimed to have collected one. However, no other naturalists record the Painted Vulture in Florida and sixty years after the sighting its validity began to be questioned, leading to what John Cassin
John Cassin
John Cassin was an American ornithologist.He is considered to be one of the giants of American ornithology, and was America's first taxonomist, describing 198 birds not previously mentioned by Alexander Wilson and John James Audubon...

 described as the most inviting problem in North American ornithology.

While most early ornithologists defended Bartram's honesty, Joel Asaph Allen
Joel Asaph Allen
Joel Asaph Allen was an American zoologist and ornithologist, born in Springfield, Massachusetts.He studied at Harvard University under Louis Agassiz...

 argued that the Painted Vulture was mythical and that Bartram mixed elements of different species to create this bird. Allen pointed out that the birds' behavior, as recorded by Bartram, is in complete agreement with the caracara's. For example, Bartram observed the birds following wildfire
Wildfire
A wildfire is any uncontrolled fire in combustible vegetation that occurs in the countryside or a wilderness area. Other names such as brush fire, bushfire, forest fire, desert fire, grass fire, hill fire, squirrel fire, vegetation fire, veldfire, and wilkjjofire may be used to describe the same...

s to scavenge for burned insects and box turtle
Box turtle
The box turtle , or box tortoise is a genus of turtle native to North America . The 12 taxa which are distinguished in the genus are distributed over four species. It is largely characterized by having a domed shell, which is hinged at the bottom, allowing the animal to close its shell tightly to...

s. Such behavior is typical of caracaras, but the larger and shorter-legged King Vultures are not well adapted for walking. This bird was believed to be common and conspicuous in Bartram's days, but it is notably absent from Bartram's notes if the Painted Vulture is accepted as a Sarcoramphus. However, Francis Harper
Francis Harper (biologist)
Francis Harper was an American naturalist. His research included studies of the Okefenokee Swamp and fieldwork in the north eastern United States and in northern Canada, and he also studied the 18th century American naturalists John and William Bartram...

 argued that the bird could, as in the 1930s, have been rare in the area Bartram visited and could have been missed.

Harper noticed that Bartram's notes were considerably altered and expanded in the printed edition, and the detail of the white tail appeared in print for the first time in this revised account. Harper believed that Bartram could have tried to fill in details of the bird from memory and got the tail coloration wrong. Harper and several other researchers have attempted to prove the former existence of a King Vulture relative in Florida at this late date, suggesting that the population was in the process of extinction and finally disappeared during a cold spell. Additionally, William McAtee, noting the tendency of birds to form Floridian subspecies, suggested that the white tail could be a sign that the Painted Vulture was a subspecies of the King Vulture.

Description

Excluding the two species of condor
Condor
Condor is the name for two species of New World vultures, each in a monotypic genus. They are the largest flying land birds in the Western Hemisphere.They are:* The Andean Condor which inhabits the Andean mountains....

s, the King Vulture is the largest of the New World vultures. Its overall length ranges from 67–81 centimeters (27–32 in) and its wingspan is 1.2–2 meters (4–6.6 ft). Its weight ranges from 2.7–4.5 kilograms (6–10 lb). An imposing bird, the adult King Vulture has predominantly white plumage, which has a slight rose-yellow tinge to it. In stark contrast, the wing coverts, flight feathers and tail are dark grey to black, as is the prominent thick neck ruff. The head and neck are devoid of feathers, the skin shades of red and purple on the head, vivid orange on the neck and yellow on the throat. On the head, the skin is wrinkled and folded, and there is a highly noticeable irregular golden crest attached on the cere
Cère
The Cère is a long river in south-western France, left tributary of the Dordogne River. Its source is in the south-western Massif Central, near the mountain Plomb du Cantal...

 above its orange and black bill; this caruncle
Wattle (anatomy)
A wattle is a fleshy dewlap or caruncle hanging from various parts of the head or neck in several groups of birds, goats and other animals. In some birds the caruncle is erectile tissue.The wattle is frequently an organ of sexual dimorphism...

 does not fully form until the bird’s fourth year.

The King Vulture has the largest skull and braincase, and strongest bill of the New World vultures. This bill has a hooked tip and a sharp cutting edge. The bird has broad wings and a short, broad, and square tail. The irises
Iris (anatomy)
The iris is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupils and thus the amount of light reaching the retina. "Eye color" is the color of the iris, which can be green, blue, or brown. In some cases it can be hazel , grey, violet, or even pink...

 of its eyes are white and bordered by bright red sclera
Sclera
The sclera , also known as the white or white of the eye, is the opaque , fibrous, protective, outer layer of the eye containing collagen and elastic fiber. In the development of the embryo, the sclera is derived from the neural crest...

. Unlike some New World vultures, the King Vulture lacks eyelashes. It also has gray legs and long, thick claws.
The vulture is minimally sexually dimorphic
Sexual dimorphism
Sexual dimorphism is a phenotypic difference between males and females of the same species. Examples of such differences include differences in morphology, ornamentation, and behavior.-Examples:-Ornamentation / coloration:...

, with no difference in plumage and little in size between males and females. The juvenile vulture has a dark bill and eyes, and a downy, gray neck that soon begins to turn the orange of an adult. Younger vultures are a slate gray overall, and, while they look similar to the adult by the third year, they do not completely molt into adult plumage until they are around five or six years of age. Jack Eitniear of the Center for the Study of Tropical Birds in San Antonio, Texas reviewed the plumage of birds in captivity of various ages and found that ventral feathers were the first to begin turning white from two years of age onwards, followed by wing feathers, until the full adult plumage was achieved. The final immature stages being a scattered black feathers in the otherwise white lesser wing coverts.

The vulture’s head and neck are featherless as an adaptation for hygiene, though there are black bristles on parts of the head; this lack of feathers prevents bacteria
Bacteria
Bacteria are a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals...

 from the carrion
Carrion
Carrion refers to the carcass of a dead animal. Carrion is an important food source for large carnivores and omnivores in most ecosystems. Examples of carrion-eaters include vultures, hawks, eagles, hyenas, Virginia Opossum, Tasmanian Devils, coyotes, Komodo dragons, and burying beetles...

 it eats from ruining its feathers and exposes the skin to the sterilizing effects of the sun.

Dark-plumaged immature birds may be confused with Turkey Vultures, but soar with flat wings, while the pale plumaged adults could feasibly be confused with the Wood Stork
Wood Stork
The Wood Stork is a large American wading bird in the stork family Ciconiidae. It was formerly called the "Wood Ibis", though it is not really an ibis.-Appearance:...

, although the latter's long neck and legs allow for easy recognition from afar.

Distribution and habitat

The King Vulture inhabits an estimated 14 million km2 (5.4 million mi2) between southern Mexico
Mexico
The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

 and northern Argentina
Argentina
Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

. In South America
South America
South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

, it does not live west of the Andes
Andes
The Andes is the world's longest continental mountain range. It is a continual range of highlands along the western coast of South America. This range is about long, about to wide , and of an average height of about .Along its length, the Andes is split into several ranges, which are separated...

, except in western Ecuador
Ecuador
Ecuador , officially the Republic of Ecuador is a representative democratic republic in South America, bordered by Colombia on the north, Peru on the east and south, and by the Pacific Ocean to the west. It is one of only two countries in South America, along with Chile, that do not have a border...

, north-western Colombia
Colombia
Colombia, officially the Republic of Colombia , is a unitary constitutional republic comprising thirty-two departments. The country is located in northwestern South America, bordered to the east by Venezuela and Brazil; to the south by Ecuador and Peru; to the north by the Caribbean Sea; to the...

 and far north-western Venezuela
Venezuela
Venezuela , officially called the Bolivarian Republic of Venezuela , is a tropical country on the northern coast of South America. It borders Colombia to the west, Guyana to the east, and Brazil to the south...

. It primarily inhabits undisturbed tropical lowland forests
Tropical and subtropical moist broadleaf forests
Tropical and subtropical moist broadleaf forests , also known as tropical moist forests, are a tropical and subtropical forest biome....

 as well as savanna
Savanna
A savanna, or savannah, is a grassland ecosystem characterized by the trees being sufficiently small or widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to support an unbroken herbaceous layer consisting primarily of C4 grasses.Some...

s and grassland
Grassland
Grasslands are areas where the vegetation is dominated by grasses and other herbaceous plants . However, sedge and rush families can also be found. Grasslands occur naturally on all continents except Antarctica...

s with these forests nearby. It is often seen near swamp
Swamp
A swamp is a wetland with some flooding of large areas of land by shallow bodies of water. A swamp generally has a large number of hammocks, or dry-land protrusions, covered by aquatic vegetation, or vegetation that tolerates periodical inundation. The two main types of swamp are "true" or swamp...

s or marshy places in the forests. This bird is often the most numerous or only vulture present in primary lowland forests in its range, but in the Amazon rainforest
Amazon Rainforest
The Amazon Rainforest , also known in English as Amazonia or the Amazon Jungle, is a moist broadleaf forest that covers most of the Amazon Basin of South America...

 it is typically outnumbered by the Greater Yellow-headed Vulture
Greater Yellow-headed Vulture
The Greater Yellow-headed Vulture, Cathartes melambrotus, also known as the Forest Vulture, is a species of bird in the New World Vulture family Cathartidae. It was considered to be the same species as the Lesser Yellow-headed Vulture until they were split in 1964. It is found in South America in...

, while typically outnumbered by the Lesser Yellow-headed
Lesser Yellow-headed Vulture
The Lesser Yellow-headed Vulture, Cathartes burrovianus, also known as the Savannah Vulture, is a species of bird in the New World Vulture family Cathartidae. It was considered to be the same species as the Greater Yellow-headed Vulture until they were split in 1964...

, Turkey
Turkey Vulture
The Turkey Vulture is a bird found throughout most of the Americas. It is also known in some North American regions as the Turkey Buzzard , and in some areas of the Caribbean as the John Crow or Carrion Crow...

 and American Black Vulture
American Black Vulture
The Black Vulture also known as the American Black Vulture, is a bird in the New World vulture family whose range extends from the southeastern United States to Central Chile and Uruguay in South America...

 in more open habitats. King Vultures generally do not live above 1500 m (5000 ft), although are found in places at 2500 m (8000 ft) altitude east of the Andes, and have been rarely recorded up to 3300 m (10000 ft) They inhabit the emergent forest level, or above the canopy. Pleistocene remains have been recovered from Buenos Aires Province
Buenos Aires Province
The Province of Buenos Aires is the largest and most populous province of Argentina. It takes the name from the city of Buenos Aires, which used to be the provincial capital until it was federalized in 1880...

 in central Argentina, over 700 km (450 mi) south of its current range, giving rise to speculation on the habitat there at the time which had not been thought to be suitable.

Ecology and behavior

The King Vulture soars for hours effortlessly, only flapping its wings infrequently. While in flight, its wings are held flat with slightly raised tips, and from a distance the vulture can appear to be headless while in flight. Its wing beats are deep and strong. Birds have been observed engaging in tandem flight on two occasions in Venezuela by naturalist Marsha Schlee, who has proposed it could be a part of courtship behaviour.

Despite its size and gaudy coloration, this vulture is quite inconspicuous when it is perched in trees. While perched, it holds its head lowered and thrust forward. It is non-migratory
Bird migration
Bird migration is the regular seasonal journey undertaken by many species of birds. Bird movements include those made in response to changes in food availability, habitat or weather. Sometimes, journeys are not termed "true migration" because they are irregular or in only one direction...

 and, unlike the Turkey
Turkey Vulture
The Turkey Vulture is a bird found throughout most of the Americas. It is also known in some North American regions as the Turkey Buzzard , and in some areas of the Caribbean as the John Crow or Carrion Crow...

, Lesser Yellow-headed
Lesser Yellow-headed Vulture
The Lesser Yellow-headed Vulture, Cathartes burrovianus, also known as the Savannah Vulture, is a species of bird in the New World Vulture family Cathartidae. It was considered to be the same species as the Greater Yellow-headed Vulture until they were split in 1964...

 and American Black Vulture
American Black Vulture
The Black Vulture also known as the American Black Vulture, is a bird in the New World vulture family whose range extends from the southeastern United States to Central Chile and Uruguay in South America...

, it generally lives alone or in small family groups. Groups of up to 12 birds have been observed bathing and drinking in a pool above a waterfall in Belize. One or two birds generally descend to feed at a carcass, although occasionally up to ten or so may gather if there is significant amount of food. King Vultures have lived up to 30 years in captivity, though their lifespan in the wild is unknown. This vulture uses urohidrosis
Urohidrosis
Urohidrosis is the habit in some birds of defecating onto the scaly portions of the legs as a cooling mechanism, using evaporative cooling of the fluids. Several species of storks and New World vultures exhibit this behaviour. Birds' droppings consist of faeces and urine, which are excreted...

, defecating on its legs, to lower its body temperature. Despite its bill and large size, it is relatively unaggressive at a kill. The King Vulture lacks a voice box
Syrinx (biology)
Syrinx is the name for the vocal organ of birds. Located at the base of a bird's trachea, it produces sounds without the vocal cords of mammals. The sound is produced by vibrations of some or all of the membrana tympaniformis and the pessulus caused by air flowing through the syrinx...

, although it can make low croaking noises and wheezing sounds in courtship, and bill-snapping noises when threatened. Its only natural predators are snake
Snake
Snakes are elongate, legless, carnivorous reptiles of the suborder Serpentes that can be distinguished from legless lizards by their lack of eyelids and external ears. Like all squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales...

s, which will prey upon the vulture's eggs and young, and large cats such as jaguar
Jaguar
The jaguar is a big cat, a feline in the Panthera genus, and is the only Panthera species found in the Americas. The jaguar is the third-largest feline after the tiger and the lion, and the largest in the Western Hemisphere. The jaguar's present range extends from Southern United States and Mexico...

s, which may surprise and kill an adult vulture at a carcass.

Diet

The King Vulture eats anything from cattle carcasses to beached fish and dead lizards. In forests, it is likely to eat sloth. Principally a carrion eater, there are isolated reports of it eating injured animals, newborn calves and small lizards.

Although it locates food by vision, the role smell has in how it specifically finds carrion has been debated. Consensus has been that it does not detect odours, and instead follows the smaller Turkey
Turkey Vulture
The Turkey Vulture is a bird found throughout most of the Americas. It is also known in some North American regions as the Turkey Buzzard , and in some areas of the Caribbean as the John Crow or Carrion Crow...

 and Greater Yellow-headed Vulture
Greater Yellow-headed Vulture
The Greater Yellow-headed Vulture, Cathartes melambrotus, also known as the Forest Vulture, is a species of bird in the New World Vulture family Cathartidae. It was considered to be the same species as the Lesser Yellow-headed Vulture until they were split in 1964. It is found in South America in...

s, which do have a sense of smell, to a carcass, but a 1991 study demonstrated that the King Vulture could find carrion in the forest without the aid of other vultures, suggesting that it locates food using an olfactory
Olfaction
Olfaction is the sense of smell. This sense is mediated by specialized sensory cells of the nasal cavity of vertebrates, and, by analogy, sensory cells of the antennae of invertebrates...

 sense. The King Vulture primarily eats carrion found in the forest, though it is known to venture onto nearby savannas in search of food. Once it has found a carcass, the King Vulture displaces the other vultures because of its large size and strong bill. However, when it is at the same kill as the larger Andean Condor
Andean Condor
The Andean Condor is a species of South American bird in the New World vulture family Cathartidae and is the only member of the genus Vultur...

, the King Vulture always defers to it. Using its bill to tear, it makes the initial cut in a fresh carcass. This allows the smaller, weaker-beaked vultures, which can not open the hide of a carcass, access to the carcass after the King Vulture has fed. The vulture’s tongue is rasp
Rasp
A rasp is a tool used for shaping wood or other material. It consists of a point or the tip, then a long steel bar or the belly, then the heel or bottom, then the tang. The tang is joined to a handle, usually made of plastic or wood. The bar has sharp teeth...

-like, which allows it to pull flesh off of the carcass’s bones. Generally, it only eats the skin and harder parts of the tissue of its meal. The King Vulture has also been recorded eating fallen fruit of the Moriche Palm
Moriche Palm
The Moriche Palm, Mauritia flexuosa, also known as the Ité Palm, Ita, Buriti, or aguaje , is a palm tree. It grows in and near swamps and other wet areas in tropical South America....

 when carrion is scarce in Bolívar state
Bolívar (state)
Bolívar State , is one of the 23 states into which Venezuela is divided. The state capital city is Ciudad Bolívar. Bolívar State covers a total surface area of 238,000 km² and in June 30, 2010 had an estimated population of 1,620,359....

, Venezuela.

Breeding

The reproductive behaviour of the King Vulture in the wild is poorly known, and much knowledge has been gained from observing birds in captivity, particularly at the Paris Menagerie
Ménagerie du Jardin des Plantes
The Ménagerie du Jardin des Plantes is a zoo in Paris, France, belonging to the botanical garden Jardin des Plantes. It is the first and thus the oldest civil zoological garden in the world.- The location :...

. An adult King Vulture sexually matures when it is about four or five years old, with females maturing slightly earlier than males. The birds mainly breed during the dry season. King Vultures mate for life and generally lay a single unmarked white egg
Egg (biology)
An egg is an organic vessel in which an embryo first begins to develop. In most birds, reptiles, insects, molluscs, fish, and monotremes, an egg is the zygote, resulting from fertilization of the ovum, which is expelled from the body and permitted to develop outside the body until the developing...

 in its nest in a hollow in a tree. To ward off potential predators, the vultures keep their nests foul-smelling. Both parents incubate the egg for the 52 to 58 days before it hatches. If the egg is lost, it will often be replaced after about six weeks. The parents share incubating and brooding duties until the chick is about a week old, after which they often stand guard rather than brood. The young are semi-altricial
Altricial
Altricial, meaning "requiring nourishment", refers to a pattern of growth and development in organisms which are incapable of moving around on their own soon after hatching or being born...

—they are helpless when born but are covered in downy feathers (truly altricial birds are born naked), and their eyes are open at birth. Developing quickly, the chicks are fully alert by their second day, and able to beg and wriggle around the nest, and preen themselves and peck by their third day. They start growing their second coat of white down by day 10, and stand on their toes by day 20. From one to three months of age, chicks walk around and explore the vicinity of the nest, and take their first flights at about three months of age.

Conservation

This bird is a species of Least Concern to the IUCN, with an estimated range of 14 million km2 (5.4 million mi2) and between 10,000 and 100,000 wild individuals. However, there is evidence that suggests a decline in population, though it is not significant enough to cause it to be listed. This decline is due primarily to habitat destruction
Habitat destruction
Habitat destruction is the process in which natural habitat is rendered functionally unable to support the species present. In this process, the organisms that previously used the site are displaced or destroyed, reducing biodiversity. Habitat destruction by human activity mainly for the purpose of...

 and poaching
Poaching
Poaching is the illegal taking of wild plants or animals contrary to local and international conservation and wildlife management laws. Violations of hunting laws and regulations are normally punishable by law and, collectively, such violations are known as poaching.It may be illegal and in...

. Although distinctive, its habit of perching in tall trees and flying at altitude render it difficult to monitor.

Relationship with humans

The King Vulture is one of the most common species of birds represented in the Mayan codices. Its glyph
Glyph
A glyph is an element of writing: an individual mark on a written medium that contributes to the meaning of what is written. A glyph is made up of one or more graphemes....

 is easily distinguishable by the knob on the bird’s beak and by the concentric circles that make up the bird’s eyes. Sometimes the bird is portrayed as a god with a human body and a bird head. According to Mayan mythology, this god often carried messages between humans and the other gods. It is also used to represent Cozcaquauhtli, the thirteenth day of the month in the Mayan calendar (13 Reed). An Ocellated Turkey
Ocellated Turkey
The Ocellated Turkey is a species of turkey residing primarily in the Yucatán Peninsula. A relative of the more common Wild Turkey , it was sometimes previously treated in a genus of its own but the differences between this species and Meleagris gallopavo are too small to justify generic...

 (Meleagris ocellata) was also considered to be the bird depicted, but the hooked bill and wattle point to the raptor.

The bird’s blood and feathers were also used to cure diseases. The King Vulture is also a popular subject on the stamps of the countries within its range. It appeared on a stamp for El Salvador
El Salvador
El Salvador or simply Salvador is the smallest and the most densely populated country in Central America. The country's capital city and largest city is San Salvador; Santa Ana and San Miguel are also important cultural and commercial centers in the country and in all of Central America...

 in 1963, Belize
Belize
Belize is a constitutional monarchy and the northernmost country in Central America. Belize has a diverse society, comprising many cultures and languages. Even though Kriol and Spanish are spoken among the population, Belize is the only country in Central America where English is the official...

 in 1978, Guatemala
Guatemala
Guatemala is a country in Central America bordered by Mexico to the north and west, the Pacific Ocean to the southwest, Belize to the northeast, the Caribbean to the east, and Honduras and El Salvador to the southeast...

 in 1979, Honduras
Honduras
Honduras is a republic in Central America. It was previously known as Spanish Honduras to differentiate it from British Honduras, which became the modern-day state of Belize...

 in 1997, Bolivia
Bolivia
Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

 in 1998, and Nicaragua
Nicaragua
Nicaragua is the largest country in the Central American American isthmus, bordered by Honduras to the north and Costa Rica to the south. The country is situated between 11 and 14 degrees north of the Equator in the Northern Hemisphere, which places it entirely within the tropics. The Pacific Ocean...

 in 1999.

Because of its large size and beauty, the King Vulture is an attraction at zoos around the world. The King Vulture is one of several bird species with an AZA
Association of Zoos and Aquariums
The Association of Zoos and Aquariums was founded in 1924 and is a nonprofit organization dedicated to the advancement of zoos and public aquariums in the areas of conservation, education, science, and recreation.The AZA headquarters is located in Silver...

 studbook, which is kept by Shelly Collinsworth of the Fort Worth Zoo
Fort Worth Zoo
The Fort Worth Zoo is a zoo in Fort Worth, Texas, USA. Founded in 1909 with one lion, two bear cubs, an alligator, a coyote, a peacock and a few rabbits, the Zoo now is home to 5000 native and exotic animals; has been named as a top zoo in the nation by Family Life magazine, the Los Angeles Times...

.

External links

  • King Vulture videos on the Internet Bird Collection
  • King Vulture photo gallery (6 photos) Photo-High Res
  • Stamps (for Belize
    Belize
    Belize is a constitutional monarchy and the northernmost country in Central America. Belize has a diverse society, comprising many cultures and languages. Even though Kriol and Spanish are spoken among the population, Belize is the only country in Central America where English is the official...

    , Bolivia
    Bolivia
    Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

    , El Salvador
    El Salvador
    El Salvador or simply Salvador is the smallest and the most densely populated country in Central America. The country's capital city and largest city is San Salvador; Santa Ana and San Miguel are also important cultural and commercial centers in the country and in all of Central America...

    , Guatemala
    Guatemala
    Guatemala is a country in Central America bordered by Mexico to the north and west, the Pacific Ocean to the southwest, Belize to the northeast, the Caribbean to the east, and Honduras and El Salvador to the southeast...

    , Honduras
    Honduras
    Honduras is a republic in Central America. It was previously known as Spanish Honduras to differentiate it from British Honduras, which became the modern-day state of Belize...

    , Nicaragua
    Nicaragua
    Nicaragua is the largest country in the Central American American isthmus, bordered by Honduras to the north and Costa Rica to the south. The country is situated between 11 and 14 degrees north of the Equator in the Northern Hemisphere, which places it entirely within the tropics. The Pacific Ocean...

    ) with RangeMap
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