Northern Bentbill

The northern bentbill is 9.5 to 10.5 cm (3.7 to 4.1 in) long and weighs about 4.5 to 7 g (0.16 to 0.25 oz). It has a distinctive fairly thick downcurved bill. The sexes have the same plumage. Adults have a mostly pale gray head whose crown is slightly darker. Their back, rump, and uppertail coverts are olive. Their wings are dusky with lemon yellow edges on the flight feathers and tips on the coverts; the latter show as two wing bars. Their tail is dusky. Their throat and breast are pale gray with olive streaks and their belly pale lemon-yellow with an olive wash on the flanks. Voice: The northern bentbill's calls are "a rapid toad-like trill, turrrrrrrrrrr...a trilling prrrr're'e'e'eat!...a single turp!...an a turp!-purrrrrrrrr".