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. Buteo polyosoma m. A taxonomic species within the family.
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Pollyosoma hawk White-necked hawk Black-faced hawk Plumbeous hawk Barred hawk Slate-colored hawk Semiplumbeous hawk. Re-split Buteo poecilochrous from B. In other projects Wikimedia Commons Wikispecies.
Race exsul may be approaching species status, and recently treated as species on grounds of long isolation and lack of sexual dimorphism Rbut very low genetic divergence R argues against such treatment. 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.
Retrieved from ” polyoxoma Contribute to Avibase Acknowledgements Flickr group Butso stats Flickr group members Media wanted Translate Avibase is also available in the following languages: Females usually have a reddish-brown back, which males usually lack, although at least some males also have this.
Smaller numbers of the latter race may visit mountain scrub and stunted Polylepis woodland at as low m but rarely below 2, m. Articles with ‘species’ microformats Taxonbar pages without Wikidata taxon IDs Taxonbars with automatically added original combinations. Chaco eagle Solitary eagle. Login or Subscribe to get access to a lot of extra features!
There are many ways to contribute—we need species information, photographs, audio, video, translations, maps, distribution data, and bird sightings. The nestlings fledge anywhere from 40 to poylosoma days. Show Details Hide Details. Polyisoma incubation period is 26 to 36 days. Variable hawks occupy open habitats at all elevations. Rufous crab hawk Common black hawk Cuban black hawk Great black hawk Savanna hawk.
Your sightings No sightings Add to a lifelist: All populations of Variable Hawk are patterned in some combination of white, gray, and chestnut.
The name variable hawk is fully deserved, as both sexes occur in several morphs. There are more than 12, regional checklists in Avibase, offered in 9 different taxonomies, including synonyms more than languages.
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. Buteo poecilochrous GurneyButeo polyosoma.
It occurs throughout the Andes and in the temperate regions of southern South America. Status and conservation Not globally threatened Least Concern. Skip to main content.
Public comments No comments yet Only members are able to post public comments. Most recent authorities have supported the lumping together of the two hawks although the issue still is controversial.
Other related concepts Buteo swainsoni x Geranoaetus polyosoma hybrid. Subspecies and Distribution G. 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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Geranoaetus polyosoma (Red-backed Hawk) – Avibase
The Juan Fernandez race is found on the islands’ volcanic slopes and barren grazed grasslands at all elevations.
If poecilochrous treated as a full species, it would buteeo include the newly described fjeldsai R as a race. To make the most of all of HBW’s features, discover our subscriptions now! Rufous-winged buzzard Grasshopper buzzard White-eyed buzzard Grey-faced buzzard.
Aguilucho Variable Spanish Paraguay: Bibliography Only subscribers are able to see the bibliography. The variable hawk hunts with prey being spotted while soaring from the air and pinned on the ground.
Genetic data indicate that this species is closest to G. Grey-backed hawk White hawk Mantled hawk.