Double-collared Seedeater
Encyclopedia
The Double-collared Seedeater (Sporophila caerulescens) is a species of bird
in the Thraupidae family, the sparrow
s, New World sparrow
s, seedeater
s, etc. and their allies.
It is found in Argentina
, Bolivia
, Brazil
, Paraguay
, Peru
, and Uruguay
; also the southern border of Colombia
on the Amazon River.
Its natural habitat
s are subtropical or tropical moist shrubland
, pastureland, and heavily degraded former forest.
species, with the male having a gray head and back, a black-collared throat, paired with a black band just below, across the upper whitish breast. It has gray legs, a medium length tail, and the stout bill for seed-eating. The female is less colorful.
cordillera northwards through Bolivia and Paraguay, and northeastwards into south-central Brazil, and southeast coastal Brazil; the species retreats into Amazonia
during the austral winter. The Double-collared Seedeater is only found in the southern Amazon Basin
, limited by the Amazon River
as its northern limit.
In the west Amazon Basin it is found in eastern regions of Peru, the Ucayali River areas, and mostly the eastern bank of the north-flowing river. In the southeast Basin, it ranges from the Cerrado
into the upstream two-thirds of the north-flowing Araguaia-
Tocantins River
drainage system.
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 Thraupidae family, the sparrow
Sparrow
The sparrows are a family of small passerine birds, Passeridae. They are also known as true sparrows, or Old World sparrows, names also used for a genus of the family, Passer...
s, New World sparrow
American sparrow
American sparrows are a group of mainly New World passerine birds, forming part of the family Emberizidae. American sparrows are seed-eating birds with conical bills, brown or gray in color, and many species have distinctive head patterns....
s, seedeater
Seedeater
The seedeaters are a form taxon of seed-eating passerine birds with a distinctively conical bill.Most are Central and South American birds that were formerly placed in the American sparrow family , but are now known to be tanagers closely related to Darwins finches...
s, etc. and their allies.
It is found in 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...
, 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...
, Brazil
Brazil
Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...
, 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...
, 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....
, and Uruguay
Uruguay
Uruguay ,officially the Oriental Republic of Uruguay,sometimes the Eastern Republic of Uruguay; ) is a country in the southeastern part of South America. It is home to some 3.5 million people, of whom 1.8 million live in the capital Montevideo and its metropolitan area...
; also the southern border of 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...
on the Amazon River.
Its natural habitat
Habitat
* Habitat , a place where a species lives and grows*Human habitat, a place where humans live, work or play** Space habitat, a space station intended as a permanent settlement...
s are subtropical or tropical moist shrubland
Shrubland
Shrubland, scrubland, scrub or brush is a plant community characterized by vegetation dominated by shrubs, often also including grasses, herbs, and geophytes. Shrubland may either occur naturally or be the result of human activity...
, pastureland, and heavily degraded former forest.
Description
It is a dimorphicSexual 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:...
species, with the male having a gray head and back, a black-collared throat, paired with a black band just below, across the upper whitish breast. It has gray legs, a medium length tail, and the stout bill for seed-eating. The female is less colorful.
Distribution
The species ranges from central Argentina east of the AndesAndes
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...
cordillera northwards through Bolivia and Paraguay, and northeastwards into south-central Brazil, and southeast coastal Brazil; the species retreats into Amazonia
Amazon Basin
The Amazon Basin is the part of South America drained by the Amazon River and its tributaries that drains an area of about , or roughly 40 percent of South America. The basin is located in the countries of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, and Venezuela...
during the austral winter. The Double-collared Seedeater is only found in the southern Amazon Basin
Amazon Basin
The Amazon Basin is the part of South America drained by the Amazon River and its tributaries that drains an area of about , or roughly 40 percent of South America. The basin is located in the countries of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, and Venezuela...
, limited by the Amazon River
Amazon River
The Amazon of South America is the second longest river in the world and by far the largest by waterflow with an average discharge greater than the next seven largest rivers combined...
as its northern limit.
In the west Amazon Basin it is found in eastern regions of Peru, the Ucayali River areas, and mostly the eastern bank of the north-flowing river. In the southeast Basin, it ranges from the Cerrado
Cerrado
The Cerrado, is a vast tropical savanna ecoregion of Brazil, particularly in the states of Gioas and Minas Gerais...
into the upstream two-thirds of the north-flowing Araguaia-
Araguaia River
The Araguaia River or, in Portuguese, Rio Araguaia is one of the major rivers of Brazil, and the principal tributary of the Tocantins. It has a total length of approximately 2,627 km. Araguaia means "river of macaws" in the Tupi language....
Tocantins River
Tocantins River
The Tocantins is a river in Brazil, the central fluvial artery of the country. In the Tupi language, its name means "toucan's beak" . It runs from south to north for about 2,640 km. It is not really a branch of the Amazon River, although usually so considered, since its waters flow into the...
drainage system.
External links
- Double-collared Seedeater videos on the Internet Bird Collection
- Stamps (for ArgentinaArgentinaArgentina , 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...
) with RangeMap - Double-collared Seedeater photo gallery VIREO Photo-High Res
- Photo-High Res; Article oiseaux
- Colored Graphic; Article www.ao.com.br
