Southern Bentbill

The southern bentbill (Oncostoma olivaceum) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Colombia and Panama. == Taxonomy and systematics == The southern bentbill was originally described in 1862 as Todirostrum olivaceum. It was later moved to genus Oncostoma that Philip Sclater had created that same year. The southern bentbill is monotypic. It shares genus Oncostoma with the northern bentbill (O. cinereigulare); in the early twentieth century at least one author considered them to be conspecific. The two form a superspecies. == Description == The southern bentbill is about 9 cm (3.5 in) long and weighs about 6 to 7 g (0.21 to 0.25 oz). It has a distinctive fairly thick downcurved bill. The sexes have the same plumage. Adults have a mostly olive head with a whitish area above the lores. Their back, rump, and uppertail coverts are olive. Their wings are dusky with lemon yellow edges on the flight feathers and greenish yellow tips on the coverts; the latter show as two indistinct wing bars. Their tail is dusky olive. Their throat and breast are yellowish white with olive streaks, their belly yellow, and their flanks olive-yellow with some olive…