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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Buteo polyosoma

Retrieved from ” https: In Bolivia, birds in valleys Chaco eagle Solitary eagle. Search Avibase search Browse by families. Genetic data indicate that this species is closest to G.

It occurs throughout the Andes and in the temperate regions of southern South America. Size is also variable in this confusing species.

The remaining plumage varies from very dark grey to whitish, and some individuals have reddish-brown to the underparts. Bird checklists – taxonomy – distribution – maps – links. Movements Some populations composed of residents, others of partial migrants.

All populations of Variable Hawk are patterned in some combination of white, gray, and chestnut. 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.

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Harris’s hawk White-rumped hawk. Earthwormsweevilsorthopterans and other invertebrates are often taken. 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.

Buteo polyosoma – Wiktionary

Black-chested buzzard-eagle Variable hawk White-tailed hawk. The variable hawk hunts with prey being spotted while soaring from the air and pinned on the ground.

Aguilucho Variable Spanish Paraguay: Buteo poecilochrous GurneyButeo polyosoma. Only subscribers are able to see the bibliography. Its taxonomy is disputed, with polyisoma splitting it into the widespread red-backed hawk G. The name variable hawk is fully deserved, as both sexes occur in several morphs. Contribute to Avibase Acknowledgements Flickr group Media stats Flickr group members Media wanted Translate Avibase is also available in the following languages: The Juan Fernandez race is found on the islands’ volcanic slopes and barren grazed grasslands at all elevations.

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Much debate has centered on the taxonomy of this species, and it frequently has been divided into two species – the butwo, smaller, and more slender “Red-backed” Hawk Buteo buto and the larger, heavier “Puna” Hawk Buteo poecilochrous of the Andes.

They build large stick nests on any elevated structure available, and sometimes breed cooperatively. Year-round Migration Breeding Non-Breeding.

Variable hawk – Wikipedia

Female in the Falkland Islands. The larger-bodied, high-elevation hawks take longer to incubate and much longer to fledge than polyksoma elevation hawks. Status and conservation Not globally threatened Least Concern. Breeding is at various seasons and may be variable for all races. Views Read Edit View history.

Variable hawks occupy open habitats at all elevations. Pale morphs are whitish below and gray above; in this morph, females also have a red back. Variable Hawks occupy open habitats at all elevations, where they prey on mammals and other small animals spotted from the air.