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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It is widespread and often common in open habitats in western and southern South America, including the Falkland Islands. Pale morphs are whitish below and gray above; in this morph, females also have a red back.

You must be logged in to view your sighting details. In other projects Wikimedia Commons Wikispecies.

The Juan Fernandez race is found on the islands’ volcanic slopes and barren grazed grasslands at all elevations. Other related concepts Buteo swainsoni x Geranoaetus polyosoma hybrid. Recommended citation Bierregaard, R. The incubation period is 26 to 36 days.

The remaining plumage varies from very dark grey to whitish, and some individuals have reddish-brown to the underparts. Falco polyosoma Avibase ID: Each checklist can be viewed with photos shared by the birding community, and also printed as PDF checklists for field use.

Handbook of the Birds of the World Alive. Year-round Polyksoma Breeding Non-Breeding.

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Only subscribers are able to see the bibliography. Search Avibase search Browse by families. The nestlings fledge anywhere from 40 to 74 days.


All populations of Variable Hawk are patterned in some combination of white, gray, and chestnut. Merge Buteo poecilochrous into B.

Dark morphs are darker gray overall, and females have chestnut extending onto the chest. Polylsoma build large stick nests on any elevated structure available, and sometimes breed cooperatively. They are most often seen soaring on warm thermals but may be seen on almost any type of polyowoma perch from sign posts to large trees. To register to myAvibase click here. Views Read Edit View history.

Aguilucho Variable Spanish Paraguay: Females usually have a reddish-brown back, which males usually lack, although at least some males also have this. Checklists There are more than 12, regional checklists in Avibase, offered in 9 different taxonomies, including synonyms more than languages. Avibase is also available in the following languages: Variable hawk Female in the Falkland Islands. Grey-backed hawk White hawk Mantled hawk.

Bibliography Only subscribers are able to see the bibliography. The larger-bodied, high-elevation hawks take longer to incubate and much longer to fledge than lower elevation hawks. It occurs throughout the Andes and in the temperate regions of southern South America.

Buteo polyosoma (Red-backed Hawk) | JuzaPhoto

Harris’s hawk White-rumped hawk. Subspecies and Distribution G. Contribute to Avibase Acknowledgements Flickr group Media stats Flickr group members Media wanted Translate Avibase is also available in the following languages: Movements Some populations composed of residents, others of partial migrants. From Wikipedia, the free encyclopedia.

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Skip to main content. Articles with ‘species’ microformats Taxonbar pages without Wikidata taxon IDs Taxonbars with automatically added original combinations. Overall, bueo, this species rates as a large Buteo.

Amerikaanse Roodrugbuizerd | Buteo Polyosoma | Variable hawk

Habitat Occupies open and semi-open habitats across broad range of elevations and topographies, from If poecilochrous treated as a full species, it would presumably include the newly described fjeldsai R as a race. Smaller numbers of the latter race may visit mountain scrub and stunted Polylepis woodland at as low m but rarely below 2, m. There are many ways to contribute—we need species information, photographs, audio, video, translations, maps, distribution data, and bird sightings.

This page was last edited on 26 Julyat 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.

Variable Hawk Geranoaetus polyosoma. Variable Hawks occupy open habitats at all elevations, where they prey on mammals and other small animals spotted from the air. The Variable Hawk is well-named, exhibiting perhaps the greatest variety of plumage patterns of any species of hawk.

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