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Named from Smith Creek Cave, Nevada, Willett's Hawk-eagle had a number of similarities with the Golden Eagle, but was larger and heavier (Howard 1935, 1962).
Spizaetus willetti Howard, 1935. Willett's hawk-eagle. Taxonomy & Nomenclature. Conservation Status. Extinct. Last record: Late Pleistocene. Distribution.
Fossil species such as Spizaetus willetti may have grown to similar sizes as the modern harpy eagle (Harpia harpyja). Studies based on the genetic ...
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Spizaetus is the typical hawk-eagle birds of prey genus found in the tropics of the Americas. It was however used to indicate a group of tropical eagles.
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of identity of the Nevada species and the living South African bird are remote. The cave bird is therefore here described as. Spizaeitus willetti, new species.
Aquila claudeguerini also shows similarities with Spizaetus willetti, in particular in the very elongate shape of the fossa met. I and the very small ...
Spizaetus willetti, and Teratornis incredibilis, arepeculiar to. Smith Creek Cave. Coragyps occidentalis ( 2 specimens ) has been recorded from other cave ...
Spizaetus willetti Howard from which it also differs in having the facet for metatarsal I not so large or so lateral and the trochleae much more arched. It ...
The species of Spizaetus have a robust mandibula with straight rami. Their tarsometatarsus is small and with narrow epiphyses. The femur is slightly more robust ...
... (Spizaetus grinnelli); Willett's hawk-eagle (Spizaetus willetti); Caribbean titan hawk (Titanohierax). Several Accipiter spp. Powerful goshawk (Accipiter ...
