Brown-breasted Bamboo Tyrant

The brown-breasted bamboo tyrant or brown-breasted pygmy-tyrant (Hemitriccus obsoletus) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Argentina and Brazil. == Taxonomy and systematics == The brown-breasted bamboo tyrant has two subspecies, the nominate H. o. obsoletus (Miranda-Ribeiro, 1905) and H. o. zimmeri (Traylor, 1979). There is some evidence that zimmeri deserves full species status. Some early to mid-twentieth century authors considered the brown-breasted bamboo tyrant to be a subspecies of the drab-breasted bamboo tyrant (H. diops) but since at least 1966 most systems have recognized them as separate species. They and the flammulated bamboo tyrant (H. flammulatus) form a superspecies. == Description == The brown-breasted bamboo tyrant is about 11 cm (4.3 in) long and weighs 9 to 11 g (0.32 to 0.39 oz). The sexes have the same plumage. Adults of the nominate subspecies have a plain brownish olive crown. They have a buffy spot above the lores and a pale buffy eye-ring on an otherwise brownish face. Their back and rump are plain brownish olive. Their wings are plain brownish olive and their tail is dusky. Their throat and breast are dingy buff with a faint buffy crescent between…