BUTEO POLYOSOMA PDF

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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White-browed hawk White-necked hawk Black-faced hawk Plumbeous hawk Barred hawk Slate-colored hawk Semiplumbeous hawk.

There’s a role for everyone! Genetic data indicate that this species is closest to G. The variable hawk hunts with prey being spotted while soaring from polyozoma air and pinned on the ground. Grey-backed hawk White hawk Mantled hawk.

Earthwormsweevilsorthopterans and other invertebrates are often taken. Contribute to Avibase Acknowledgements Flickr group Media stats Flickr group members Media wanted Translate Avibase is also available in the following languages: Its taxonomy is disputed, with some splitting it into the widespread red-backed hawk G. Rufous-winged buzzard Grasshopper buzzard White-eyed buzzard Grey-faced buzzard.

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.

Geranoaetus polyosoma (Red-backed Hawk) – Avibase

To make the most of all of HBW’s features, discover our subscriptions now! Status and conservation Not globally threatened Least Concern. Though often the most likely race to be found in lowlands, even the red-backed is less than common below an elevation of m up to 3, m. Chaco eagle Solitary eagle. Dark morphs are darker polosoma overall, and females have chestnut extending onto the chest. From Wikipedia, the free encyclopedia. Your sightings No sightings Add to a lifelist: Checklists There are more than 12, regional checklists in Avibase, offered in 9 different taxonomies, including synonyms more than languages.

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Roodrugbuizerd, Roodrugbuizerd rode rug Norwegian: Descriptive notes 45—62 cm; — g; wingspan — cm. In other projects Wikimedia Commons Wikispecies. Habitat Occupies open and semi-open habitats across broad range of elevations and topographies, poluosoma True to its English name, a highly variable, polymorphic hawk with longish wings and legs and medium-length tail Public comments No comments yet Polyksoma members are able bureo post public comments.

Other related concepts Buteo swainsoni x Geranoaetus polyosoma hybrid.

It is widespread and often common in open habitats in western and southern South America, including the Falkland Islands. The Variable Hawk is well-named, exhibiting perhaps the greatest variety of plumage patterns of any species of hawk.

Re-split Buteo poecilochrous from B. Buteo poecilochrous GurneyButeo polyosoma. They build large stick nests on any elevated structure available, and sometimes breed cooperatively. Avibase buheo been visited , times since 24 June Variable Hawk Geranoaetus polyosoma.

Variable hawk

Each checklist can be viewed with photos shared by the birding community, and also printed as PDF checklists for field use. 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. What do coloured bullet points mean? Only subscribers are able to see the bibliography. Adults of all have a white tail with a contrasting black subterminal band and grey wings barred dark in flight from below, the remiges appear whitish with fine barring and a broad black tip.

Food and feeding Nominate race a generalist mammal predator, taking most prey roughly in proportion to its relative abundance; e. This page was last edited on 26 Julyat Butei exsul may be approaching species status, and recently treated as species on grounds of long isolation and lack of sexual dimorphism Rbuteeo very low genetic divergence R argues against such treatment. Aguilucho Variable Spanish Paraguay: Variable hawk Female in the Falkland Islands.

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Pale morphs are whitish below and gray above; in this morph, females polyodoma have a red back. Black-chested buzzard-eagle Variable hawk White-tailed hawk. Formerly placed in Buteo and thought, mistakenly, to be close to Buteo galapagoensis which see and to include Buteo ventralis as colour morph see that species.

They build large stick nests on any elevated structure available, and sometimes breed cooperatively. Falco polyosoma Quoy and Gaimard, Falkland Islands.

Recommended citation Bierregaard, R.

There are more than 12, regional checklists in Avibase, offered in 9 different taxonomies, including synonyms more than languages. By using this site, you agree to the Terms of Use and Privacy Policy. Avibase is also available in the following languages: Avibase polyosoms 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.

Falco polyosoma Avibase ID: 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 poecilochrous in fact is distinguishable from other Variable Hawks. Much debate has centered on the taxonomy of this species, and it frequently has been divided into two species – the widespread, smaller, and more slender “Red-backed” Hawk Buteo polyosoma and the larger, heavier “Puna” Hawk Buteo poecilochrous of the Andes.

Most recent authorities have supported the lumping together of the two hawks although the issue still is controversial. Related taxa Other related concepts Buteo swainsoni x Geranoaetus polyosoma hybrid Other synonyms Bulgarian: