BUTEO POLYOSOMA PDF

  • July 12, 2019

figure, drawing, illustration of Variable Hawk (Geranoaetus polyosoma) Formerly placed in Buteo and thought, mistakenly, to be close to Buteo galapagoensis. Red-backed Hawk (Geranoaetus polyosoma) [version 1] Avibase taxonomic concepts v. 01 (August ): Red-backed Hawk (Buteo polyosoma) [version 1]. Red-backed Hawk (Buteo polyosoma) English Wikipedia has an article on: Proper noun[edit]. Buteo polyosoma m. A taxonomic species within the family.

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There are a few ways by which you can help the development of this page, such as joining the Flickr buuteo for photos or providing translations of the site in addition languages.

Only subscribers are able to see the bibliography. There are more than 12, regional checklists in Avibase, offered in 9 different taxonomies, including synonyms more than languages. Search Avibase search Browse by families. They build large stick nests on any elevated structure available, and sometimes breed cooperatively.

Translate Avibase is also available in the following languages: Contribute to Avibase Acknowledgements Flickr group Media stats Flickr group members Media wanted Translate Avibase is also available in the following languages: Size is also variable in this confusing species.

Avibase checklists Search Avibase search Browse by families Contribute There are a few ways by which you can help the development of this page, such as joining the Flickr group for photos or providing translations of the site in addition languages.

From Wikipedia, the free encyclopedia.

Variable hawk – Wikipedia

Aguilucho Variable Spanish Paraguay: By using this site, you agree to the Polyowoma of Use and Privacy Policy. Rufous crab hawk Common black hawk Cuban black hawk Great black hawk Savanna hawk. Bird checklists – taxonomy – distribution – maps – links.

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The Variable Hawk is well-named, exhibiting perhaps the greatest variety of plumage patterns of any species of hawk. You must be logged in to view your sighting details.

Grey-backed hawk White hawk Mantled hawk. Buteo poecilochrous GurneyButeo polyosoma.

The nestlings fledge anywhere from 40 to 74 days. Females usually have a reddish-brown back, which males usually lack, although at least some males also have this. Habitat Occupies open and semi-open habitats across broad range of elevations and topographies, from Articles with ‘species’ microformats Taxonbar pages without Wikidata taxon IDs Taxonbars with automatically added original combinations.

Other related concepts Buteo swainsoni x Geranoaetus polyosoma hybrid. The remaining plumage varies from very dark grey to whitish, and some individuals have reddish-brown to the underparts. Views Read Edit Polysooma history. Most recent authorities have supported the lumping together of the two hawks although the issue still is controversial.

Variable hawks occupy open habitats at all elevations. Contribute There are a few ways by which you can help the development of this page, such as joining the Flickr group for photos or providing translations of the site in addition languages.

The name variable hawk is fully deserved, as both sexes occur in several morphs. Falco polyosoma Avibase ID: Its taxonomy is disputed, with some splitting it into the widespread red-backed hawk G. Each checklist can be viewed with photos shared by the birding community, and also printed as PDF checklists for field use. In Bolivia, birds in valleys Rufous-winged buzzard Grasshopper buzzard White-eyed buzzard Grey-faced buzzard.

Retrieved from ” https: The Juan Fernandez race is found on the islands’ volcanic slopes and barren grazed grasslands at all elevations. Harris’s hawk White-rumped hawk. Subspecies and Polyoosoma G. MyAvibase allows you to create and manage your own lifelists, and produce useful reports to help you plan your ployosoma birding excursion. This page was last edited on 26 Julyat Handbook of the Birds of the World Alive.

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Year-round Migration Breeding Non-Breeding. The situation is complicated by extensive, parallel plumage variation in the two groups as well as variation in size and structure with latitude and elevation, and controversy continues to swirl around the question of whether po,yosoma in fact is distinguishable from other Variable Hawks.

The variable hawk Geranoaetus polyosoma is a polymorphic species of bird of prey in the family Accipitridae.

Variable hawk

They are most often seen soaring on warm thermals but may be seen on almost any type of raised perch from sign posts to large trees. Retrieved 15 January Your sightings No sightings Add to a lifelist: To make the most of all of HBW’s features, discover our subscriptions now!

Avibase is also available in the following languages: Re-split Buteo poecilochrous from B. There are many ways to contribute—we need species information, photographs, audio, video, translations, maps, distribution data, polyosma bird sightings. The red-backed race inhabits the widest range of areas of the variable hawk races, including above tree line in mountains, Buteoo coastal foothills, Patagonian steppesagricultural areas and edges of river galleries, beech woods and humid premontane and lowland forests.

Show Details Hide Details. Help complete this species There are many ways to contribute—we need species information, photographs, audio, video, translations, maps, distribution data, and bird sightings.