Named from Smith Creek Cave, Nevada, Willett's Hawk-eagle had a number of similarities with the Golden Eagle, but was larger and heavier.
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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woodwardi and Thrasaitus to the long slender type, similar to the fossil, found in Aquila and Spizaetus). (5) Shaft narrowing slightly above trochleae ...
Spizaetus was named by Vieillot (1816). It is extant. It was assigned to Buteoninae by Wetmore (1940) and Wetmore (1956); to Aquilinae by Howard (1932) and ...
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 Howard, 1935 · Online Resources · Compiled distribution maps · Occurrence records map (0 records) · Datasets.
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 ...
Apr 29, 1974 · North American fossil species of Spizaetus fall into 2 groups: large massive forms which seem similar to Aquila (S. tanneri, S. willetti, and S.