Pearly-breasted Cuckoo

The pearly-breasted cuckoo is 25 to 28 cm (9.8 to 11 in) long, about half of which is the tail. Males weigh about 45 to 53 g (1.6 to 1.9 oz) and females about 54 to 61 g (1.9 to 2.2 oz). Their bill is stout and somewhat decurved. Its maxilla is brown to black with a yellow base and its mandible yellow to orange with a black tip. Males and females have the same plumage. Adults' upperparts are grayish brown with a light bronze gloss. Their wings are grayish brown with white on the primaries' inner webs. Voice: The pearly-breasted cuckoo's primary song is the "Kuoup Call", "a series (usually 5–15, but sometimes 20 or more) of loud and somewhat frog-like kuoup notes." It also makes a "Rattle Call" transcribed as "tuctuctuctuctuctuc towlp, tówlp, tówlp, tówlp" that similar to the yellow-billed cuckoo's call.