Yellow-shouldered blackbird

The nominate form of the Yellow-shouldered Blackbird was first described from Puerto Rico and Vieques in 1862 by Philip Sclater as Icterus xanthomus. The species is closely related to, and possibly derived from, the Red-winged Blackbird . The Tawny-shouldered Blackbird , a species from Cuba and Haiti, is morphologically intermediate between A. xanthomus and A. humeralis. Until recently, some authors considered A. xanthomus as a subspecies of A. humeralis. The 1983 American Ornithologists' Union edition considered A. xanthomus, together with A. humeralis, a superspecies. The main physical difference between A. xanthomus and A. humeralis resides in their bills, with A. humerali's being broader toward the base. The recognized subspecies A. x. monensis, or Mona Yellow-shouldered Blackbird, was described by Barnes in 1945 from the islands of Mona and Monito.

The Yellow-shouldered blackbird is classified as Endangered (EN), considered to be facing a very high risk of extinction in the wild.

Yellow-shouldered Blackbird, was described by Barnes in 1945 from the islands of Mona and Monito. Physical description - The Yellow-shouldered Blackbird, as its name implies, is a glossy black bird with a small yellow humeral patch around its "shoulders" outlined by a white margin. Immature individuals possess a duller coloration and a brown abdomen. More

The Yellow-shouldered Blackbird, as its name implies, is a glossy black bird with a small yellow humeral patch around its "shoulders" outlined by a white margin. Immature individuals possess a duller coloration and a brown abdomen. Although plumage coloration is indistinguishable between the sexes, sexual dimorphism (visual physical differences between the sexes) is present in this species with males being larger than females. Plumage abnormality is rare in this species. More

Yellow-shouldered Blackbird More

The Yellow-shouldered Blackbird (Agelaius xanthomus) is a critically endangered Puerto Rican endemic. The photos presented here are of marginal photographic quality, but due to the extremely low world population of the species I have posted them. This bird, one of seven or eight we saw, was photographed on the grounds of the Parador Villa Parguera on the southwest coast in July, 1998. It was photographed with a Canon T90 & FD400mm F/4.5 lens on Fuji Sensia 100. More

In size the yellow-shouldered blackbird is slightly smaller than the red-winged blackbird. Adults and juveniles of both sexes have all black plumage with yellow epaulettes. Juveniles can be distinguished from adults by black speckling over the edges of the epaulettes. Adult males are significantly larger, about 17 percent by weight, than the females. Although this species is omniverous, it can be basically characterized as an arboreal insectivore. During the nesting season the young's diet is about 9O percent arthropod material. More

Information on the yellow-shouldered blackbird is currently being researched and written and will appear here shortly Authentication - This information is awaiting authentication by a species expert, and will be updated as soon as possible. If you are able to help please contact: arkive@wildscreen.org.uk References - 1. IUCN Red List (April, 2010) http://www.iucnredlist. More

The Yellow-shouldered Blackbird (Agelaius xanthomus), of Puerto Rico, Mona, and nearby islands, has become uncommon and restricted in range since about 1940, and probably fewer than 3,000 individuals remain (Post and Wiley 1976). As part of a long-term investigation of the biology of this species, I began in 1972 to capture and mark Yellow- shouldered Blackbirds. At the same time, I collected information on diseases and ectoparasites of birds that I handled. More

Yellow-shouldered Blackbirds are non-migratory birds, but a portion of the population of the nominate form moves from coastal areas to inland areas during the non-breeding season to feed. Diet Yellow-shouldered Blackbirds are omnivorous, but are considered to be arboreal insectivores since the majority of their diet consists of insects. Wetmore and Post performed studies to determine the dietary habits of the nominate form A. x. xanthomus. More

Threats to the yellow-shouldered blackbird include the loss of its upland nesting habitat for residential and tourist development, encroachments by illegal houses and houseboats in mangrove areas, and nest parasitism by the shiny cowbird. Achievements: Cowbird trapping, installation of nest structures, predator control, and habitat protection have increased the blackbird's reproductive success. More

Rezultati za: yellow-shouldered blackbirdPrijevodi 1 - 30 of 414 Engleski Engleski Finski Finski yellow-shouldered blackbird puertoriconturpiaali, Agelaius xanthomus red-shouldered blackbird kuubanturpiaali, Agelaius assimilis tawny-shouldered blackbird antillienturpiaali, Agelaius humeralis yellow-headed blackbird keltahupputurpiaali, Xanthocephalus xanthocephalus yellow-hooded blackbird sitruunahupputurpiaali, Chrysomus icterocephalus yellow-winged blackbird liekkisiipiturpiaali, Chrysomus thilius yellow-shouldered grassquit More

Biology of the yellow-shouldered blackbird-Agelaius on a tropical island (FLMNH Bulletin v.26, no.3) Title: Biology of the yellow-shouldered blackbird-Agelaius on a tropical island CITATION THUMBNAILS PAGE IMAGE ZOOMABLE Full Citation STANDARD VIEW MARC VIEW METADATA Permanent Link: http://www.uflib.ufl. More

What do Yellow-shouldered Blackbird use for food? Read answer... What is a mexican blackbird? Read answer... More