Prong-billed Barbet

The prong-billed barbet is 17 to 18.5 cm (6.7 to 7.3 in) long and weighs about 60 to 70 g (2.1 to 2.5 oz). Its bill is silvery gray to bluish with a dark tip; a notch on the tip of the mandible provides its English name. The maxilla has a hooked tip and a notch on the side. Adults have a dull golden brown crown, brownish olive nape and upper back, and olive green lower back, rump, and uppertail coverts. Males have a glossy black tuft of feathers at the rear of the crown; females lack it. Both sexes have dull slaty black lores, cheeks, and chin. Voice: The prong-billed barbet's song has been described as "a deep cwa-cwa-cwa-cwa...repeated many times" and as "a resonant, far-carrying, rather throaty cwa-cwa-cwa-cwa". Both sexes sing, frequently in duet, and also in a "chorus" by several birds.