Eye-ringed Flatbill

The eye-ringed flatbill (Rhynchocyclus brevirostris) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Mexico, every Central American country, and Colombia. == Taxonomy and systematics == The eye-ringed flatbill was originally described in 1847 as Cyclorhynchus brevirostris. It has three subspecies, the nominate R. b. brevirostris (Cabanis, 1847), R. b. pallidus (Laurence C. Binford, 1965), and R. b. hellmayri (Griscom, 1932). For a time in the early twentieth century what is now the Pacific flatbill (R. pacificus) was also treated as a subspecies. == Description == The eye-ringed flatbill is 15 to 17 cm (5.9 to 6.7 in) long and weighs 21 to 23 g (0.74 to 0.81 oz). The sexes have almost the same plumage. Adults have a bold white eye-ring, a faint dark smudge below the eye, grayish lores and cheeks, and a dusky patch behind grayish ear coverts. The rest of their head and their entire upperparts are olive-green. Their wings and tail are dusky with paler yellow-olive edges on the feathers. Males have stiff comb-like barbs on the outer primaries; females lack them. In both sexes the throat and upper breast are dull to dusky olive-green that becomes paler…