May 27, 2013
In this photo the throat is bulging slightly as it does its call.
It tends to do a grouped rhythm of three or four but it often does irregular cadences.
The Black-billed cuckoo is a fairly large bird at 11 1/2 to 12 inches in length. (29-30cm)
The bill is dark grey to blackish It has small under tail spots which can be difficult to see.