Muscisaxicola
The ground tyrants (''Muscisaxicola'') are a genus of passerine birds belonging to the tyrant flycatcher family Tyrannidae. There are about 13 different species. They are ground-dwelling birds which inhabit open country in South America, particularly the Andes and Patagonia. Several southern species are migratory, moving northward for the winter. Ground tyrants feed on insects and other invertebrates, mainly by picking them from the ground. A flight display is performed during the breeding season. The nest is a cup of twigs or grass which, in most species, is built in a burrow, crevice or under rocks. Ground tyrants are fairly small (13–20 cm in length) with longish legs, a slender bill and an erect posture. The plumage is dull and mainly grey or brown with paler underparts. The head is variably patterned with several species having rufous patches on the crown or white between the bill and eye. The birds have simple calls and are often silent. Systematics and taxonomy A ...
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Tyrant Flycatcher
The tyrant flycatchers (Tyrannidae) are a family of passerine birds which occur throughout North and South America. They are considered the largest family of birds known to exist in the world, with more than 400 species. They are the most diverse avian family in every country in the Americas, except for the United States and Canada. The members vary greatly in shape, patterns, size and colors. Some tyrant flycatchers may superficially resemble the Old World flycatchers, which they are named after but are not closely related to. They are members of suborder Tyranni (suboscines), which do not have the sophisticated vocal capabilities of most other songbirds.del Hoyo, J. Elliott, A. & Christie, D. (editors). (2004) ''Handbook of the Birds of the World. Volume 9: Cotingas to Pipits and Wagtails''. Lynx Edicions. A number of species previously included in this family are now placed in the family Tityridae (''see Systematics''). Sibley and Alquist in their 1990 bird taxonomy had the ...
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