Black-billed Cuckoo
Coccyzus erythropthalmus
The black-billed cuckoo typically calls the first syllable of its name cucucu in a repeated pattern of three or four cu's (cucucu or cucucucu). It also makes a number of less well-known calls including a harsh grating call, k-k-k. It may call at night. (Albany County, New York.)
Habitat: Woods and thickets, especially where caterpillars are abundant.
Yellow-billed Cuckoo
Coccyzus americanus
A common call of the Yellow-billed Cuckoo is a repeated, hollow-sounding kow. The rate of calling may slow toward the end of a series. (Schoharie County, New York.)
Habitat: Woods and thickets, especially where caterpillars are abundant.