The white-browed chat-tyrant (Ochthoeca leucophrys) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Bolivia, Chile, Ecuador, and Peru.
Taxonomy and systematics
The white-browed chat-tyrant was originally described as "F leucophrys".
The white-browed chat-tyrant has these six subspecies:
O. l. dissors Zimmer, JT, 1940
O. l. interior Zimmer, JT, 1930
O. l. urubambae Zimmer, JT, 1937
O. l. leucometopa Sclater, PL & Salvin, 1877
O. l. leucophrys (d'Orbigny & Lafresnaye, 1837)
O. l. tucumana Berlepsch, 1906
During much of the first half of the twentieth century, what is now the Piura chat-tyrant (O. piurae) was considered an additional subspecies, and at least one publication suggests that it should return to that status. The white-browed and Piura chat-tyrants form a superspecies. In addition, it has been suggested that urubambae be merged into interior.
At Machu Picchu, Peru
Description
The white-browed chat-tyrant is 14.5 to 15.5 cm (5.7 to 6.1 in) long. The sexes have the same plumage. Adults of the nominate subspecies O. l. leucophrys have a dark gray to grayish brown crown, a wide white supercilium that begins at the lores and extends well past the eye, and a blackish "mask". Their upperparts are a slightly lighter gray to grayish brown than the crown with a slight cinnamon tinge on the lower back and rump. Their wings are a duskier gray with two faint cinnamon wing bars. Their tail is dusky with white outer webs on the outermost feathers. Their throat and underparts are pale gray that becomes whitish on the crissum. Juveniles have a brownish overall tinge with conspicuous wing bars.
The other subspecies of the white-browed chat-tyrant differ from the nominate and each other thus:
O. l. leucometopa: darker upperparts than nominate with no cinnamon, and white edges on the remiges
O. l. urubambae: like leucometopa with a slightly paler crown
O. l. interior: like urubambae but overall slightly...
