Black-billed Cuckoo diurnal flight call
Fig.2. Maryland May 23, 1993 (MO).
Call from a perched bird on the breeding grounds.
Diurnal calling sequence:
1. New York June 5, 1989 (WRE). "Coo" series from perched bird. Song Sparrow and Baltimore Oriole in singing the background amidst sound of Gypsy Moth larvae droppings striking leaves.