Yellow Grosbeak
Encyclopedia
The Yellow Grosbeak Pheucticus chrysopeplus, is a medium-sized seed
Seed
A seed is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and angiosperm plants which occurs after fertilization and some growth within the mother plant...

-eating 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...

 in the same family as the Northern Cardinal
Northern Cardinal
The Northern Cardinal or Redbird or Common Cardinal is a North American bird in the genus Cardinalis. It can be found in southern Canada, through the eastern United States from Maine to Texas and south through Mexico...

, "tropical" or "New World" buntings, and "cardinal-grosbeaks" or "New World" grosbeaks.

The Yellow Grosbeak occurs on the Pacific slope of 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...

 from central Sonora
Sonora
Sonora officially Estado Libre y Soberano de Sonora is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided into 72 municipalities; the capital city is Hermosillo....

 to northwestern Oaxaca
Oaxaca
Oaxaca , , officially Estado Libre y Soberano de Oaxaca is one of the 31 states which, along with the Federal District, comprise the 32 federative entities of Mexico. It is divided into 571 municipalities; of which 418 are governed by the system of customs and traditions...

, and in southern Chiapas
Chiapas
Chiapas officially Estado Libre y Soberano de Chiapas is one of the 31 states that, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 118 municipalities and its capital city is Tuxtla Gutierrez. Other important cites in Chiapas include San Cristóbal de las...

 and 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 Sonora it is 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...

. It has been considered conspecific with P. tibialis
Black-thighed Grosbeak
The Black-thighed Grosbeak, Pheucticus tibialis, is a large seed-eating bird in the cardinal family, which is endemic to the mountains of Costa Rica and western Panama....

of 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...

 and P. chrysogaster of 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 occurs mostly in trees in forest, woodland, and edge, but generally not dense rain or cloud forest
Cloud forest
A cloud forest, also called a fog forest, is a generally tropical or subtropical evergreen montane moist forest characterized by a persistent, frequent or seasonal low-level cloud cover, usually at the canopy level. Cloud forests often exhibit an abundance of mosses covering the ground and...

. Occasional vagrants have reached the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, mostly in summer in Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

, but it has also been reported from California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

, Colorado
Colorado
Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...

, New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

, and even Iowa
Iowa
Iowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New...

.

It is considerably bigger than its North American congeners, the Black-headed Grosbeak
Black-headed Grosbeak
The Black-headed Grosbeak, Pheucticus melanocephalus, is a medium-size seed-eating bird in the same family as the Northern Cardinal, the Cardinalidae. It is sometimes considered conspecific with the Rose-breasted Grosbeak, P...

 and the Rose-breasted Grosbeak
Rose-breasted Grosbeak
The Rose-breasted Grosbeak, Pheucticus ludovicianus, is a large seed-eating songbird in the cardinal family . It breeds in cool-temperate North America, migrating to tropical America in winter.-Description:...

, being about 21.5–24 cm (8.5–9.5 in) long and weighing on average 62 g (2.2 oz). The head is "massive" (Sibley 2000), and the gray-black bill is even bigger in proportion to the head than those of its northern relatives.

The plumage has bold contrasts of yellow, white, and black or gray. Males' head and underparts are solid yellow—light lemon in most populations, "brilliant golden-orange" (Howell and Webb 1995) in P. c. aurantiacus of Chiapas and Guatemala. The back is black with yellow mottlings, the rump is yellow, and the upper tail coverts are black with white tips. The wings and tail are black with conspicuous white spots, patches, and wingbars. Females are similar but the upperparts are more olive, with dark streaks on the crown and back. Black is replaced by gray, and the white markings on the wings, especially the white base of the primaries, are smaller. Females are very similar in pattern to female Flame-colored Tanager
Flame-colored Tanager
The Flame-colored Tanager, Piranga bidentata, formerly known as the Stripe-backed Tanager, is a medium-sized American songbird. Formerly placed in the tanager family , it and other members of its genus are now classified in the cardinal family...

s, but much bigger, especially as to the bill. Immatures resemble females overall.

Typical calls are a metallic iehk or plihk (Howell and Webb) or piik (Sibley) resembling other Pheucticus grosbeaks' calls, and a soft whoi or hu-oi (Howell and Webb 1995) or hoee (Sibley 2000) often given in flight. The song is a variable, rich-toned warble resembling that of the Black-headed Grosbeak, but shorter.

As is typical of the genus, it lays 2 to 5 pale bluish to greenish eggs with heavy brown and gray speckling. The cup nest is built at medium height in a bush or small tree.

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