The crested oropendola (''Psarocolius decumanus''), also known as the Suriname crested oropendola or the cornbird, is a

New World The term "New World" is used to describe the majority of lands of Earth's Western Hemisphere, particularly the Americas, and sometimes Oceania."America." ''The Oxford Companion to the English Language'' (). McArthur, Tom, ed., 1992. New York: ...

tropical

icterid Icterids () or New World blackbirds make up a family, the Icteridae (), of small to medium-sized, often colorful, New World passerine birds. The family contains 108 species and is divided into 30 genera. Most species have black as a predominant ...

bird. It is a resident breeder in lowland

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...

east of the

Andes The Andes ( ), Andes Mountains or Andean Mountain Range (; ) are the List of longest mountain chains on Earth, longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range ...

, from

Panama Panama, officially the Republic of Panama, is a country in Latin America at the southern end of Central America, bordering South America. It is bordered by Costa Rica to the west, Colombia to the southeast, the Caribbean Sea to the north, and ...

and

Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel ...

south to northern

Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...

, as well as on

Trinidad Trinidad is the larger, more populous island of the Republic of Trinidad and Tobago, the country. The island lies off the northeastern coast of Venezuela and sits on the continental shelf of South America. It is the southernmost island in ...

and

Tobago Tobago, officially the Ward of Tobago, is an List of islands of Trinidad and Tobago, island and Regions and municipalities of Trinidad and Tobago, ward within the Republic of Trinidad and Tobago. It is located northeast of the larger islan ...

. If the

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

''Gymnostinax'' for the

Montezuma oropendola The Montezuma oropendola (''Psarocolius montezuma'') is a New World tropical icterid bird. It is a resident breeder in the Caribbean coastal lowlands from southeastern Mexico to central Panama, but is absent from El Salvador and southern Guatemal ...

and its closest relatives were considered valid, this species would probably belong in that genus (Price & Lanyon 2002). It is a common bird, seen alone or in small flocks foraging in trees for large

insect Insects (from Latin ') are Hexapoda, hexapod invertebrates of the class (biology), class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (Insect morphology#Head, head, ...

fruit In botany, a fruit is the seed-bearing structure in flowering plants (angiosperms) that is formed from the ovary after flowering. Fruits are the means by which angiosperms disseminate their seeds. Edible fruits in particular have long propaga ...

seed In botany, a seed is a plant structure containing an embryo and stored nutrients in a protective coat called a ''testa''. More generally, the term "seed" means anything that can be Sowing, sown, which may include seed and husk or tuber. Seeds ...

s and some

nectar Nectar is a viscous, sugar-rich liquid produced by Plant, plants in glands called nectaries, either within the flowers with which it attracts pollination, pollinating animals, or by extrafloral nectaries, which provide a nutrient source to an ...

. The male is 46 cm long and weighs 300 g; the smaller female is 37 cm long and weighs 180 g. The plumage of the crested oropendola has a musty smell due to the oil from the

preen gland The uropygial gland, informally known as the preen gland or the oil gland, is a bilobed sebaceous gland possessed by the majority of birds used to distribute the gland's oil through the plumage by means of preening. It is located dorsally at the ...

Description

Adult males are mainly black with a chestnut rump and a tail which is bright yellow apart from two dark central feathers. There is a long narrow crest which is often difficult to see. The iris is blue and the long bill is whitish. Females are similar but smaller, duller, and crestless.

Taxonomy

There are four

subspecies In Taxonomy (biology), biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (Morphology (biology), morpholog ...

: * ''P. d. insularis'' of Trinidad and Tobago has much chestnut edging on the feathers of the wings and back. * The nominate subspecies ''P. d. decumanus'' occurs from Colombia south to the

Amazon Amazon most often refers to: * Amazon River, in South America * Amazon rainforest, a rainforest covering most of the Amazon basin * Amazon (company), an American multinational technology company * Amazons, a tribe of female warriors in Greek myth ...

Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...

. * ''P. d. maculosus'' breeds south of the Amazon. It is browner, and has yellow feathers scattered through the body plumage. * The northern form ''P. d. melanterus'' of Panama and western Colombia is very similar, differing only in the amount of chestnut feather tipping, and is of dubious status. Crested oropendola (Psarocolius decumanus decumanus) in flight Sumaco.jpg, ''P. d. decumanus'', Ecuador Psarocolius decumanus -Asa Wright Nature Centre, Northern Range, Trinidad, Trinidad and Tobago-8.jpg, ''P. d. insularis'', Trinidad

Behaviour

The crested oropendola inhabits forest edges and clearings. It is a colonial breeder which builds a hanging woven nest, more than 125 cm long, high in a tree. It lays two blotched blue-grey

eggs An egg is an organic vessel in which an embryo begins to develop. Egg, EGG or eggs may also refer to: Biology * Egg cell, the female reproductive cell (gamete) in oogamous organisms Food * Eggs as food Places * Egg, Austria * Egg, Switzerland ...

which hatch in 15–19 days, with another 24–36 days to fledging. Each colony has a dominant male, which mates with most of the females following an elaborate bowing display. There may be 15–30 females and only 3–4 males. Outside the breeding season, this species is quite mobile, with some seasonal movements. The distinctive songs of the male include a descending call reminiscent of sliding one's hand on a piano. Both sexes have a loud ''clack'' call. The crested oropendola is a host of the

Acanthocephala Acanthocephala ( Greek , ' 'thorn' + , ' 'head') is a group of parasitic worms known as acanthocephalans, thorny-headed worms, or spiny-headed worms, characterized by the presence of an eversible proboscis, armed with spines, which it uses t ...

n intestinal parasite '' Apororhynchus aculeatus''.

References

Other sources

* ffrench, Richard; O'Neill, John Patton & Eckelberry, Don R. (1991): ''A guide to the birds of Trinidad and Tobago'' (2nd edition). Comstock Publishing, Ithaca, N.Y.. *Hilty, Steven L. (2003): ''Birds of Venezuela''.

Christopher Helm Christopher Alexander Roger Helm (born Dundee, 1 February 1937 – 20 January 2007) was a Scottish book publisher, notably of ornithology related titles, including the ''Helm Identification Guides''. Born in Dundee, he was raised in Forfar, wh ...

, London. *Jaramillo, Alvaro & Burke, Peter (1999): ''New World Blackbirds''.

, London. *

External links

Crested oropendola videos, photos and sounds
- Internet Bird Collection {{Taxonbar, from=Q906518 crested oropendola Birds of Panama Birds of Trinidad and Tobago Birds of South America crested oropendola Birds of the Amazon rainforest Birds of Brazil