Birds of Argentina
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The Black Hawk-Eagle (Spizaetus tyrannus), also known as the
Tyrant Hawk-Eagle, is a species of eagle found from central Mexico to eastern Peru, the south of Brazil, and far northern Argentina. Its preferred habitats include humid and moist forests close to rivers, and several types of woodland. It is uncommon to fairly common throughout most of its range.
It has black plumage with varying patterns on its wings and body, and white speckling in places.
It has barred wings, slightly elliptical in shape, and a long, narrow tail which is rarely fanned. The four grey bars on the tail are distinctive to the Black Hawk-Eagle, as is the white line seen slightly above the bird's eye.
While flying, the broadness and shortness of the wings become apparent.Birds of Venezuela by Steve Hilty.
Princeton University Press, 2003 While in flight, the bird's tail is typically kept closed.
Though light and small compared to other members of its genus, this bird mainly eats opossums and monkeys, as well as, occasionally, small bats and birds. Its popular name in Brazil is "Gaviao-pega-macaco", which means "monkey-catching hawk". The birds it takes can be quite large, such as toucans,and chachalacas. The dietary habits of the Black Hawk-Eagle, however, remain mostly unknown, with very few records of the bird eating.
Like its diet, the Black Hawk-Eagle's breeding behaviour is little known other than some details relating to its nest: composed of sticks and possibly other materials, the nest is around one metre and a half in total diameter and is usually constructed in tall trees, often around fifteen metres high. The variety of tree chosen probably varies greatly, but they have been observed chiefly in pine trees.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article Black Hawk-eagle