All About Birds: Black-billed CuckooComprehensive information on North American birds including a bird guide, ... explains why both Black-billed and Yellow-billed cuckoos are called "Rain Crows. ... birds.cornell.edu AllAboutBirds BirdGuide Black-billed_Cuckoo l Black-billed Cuckoo (Coccyzus erythropthalmus) Bird CallsHome Overview Species Cuckoos Black-billed Cuckoo (Coccyzus erythropthalmus) ... Description: Typical flight call of the Black-billed Cuckoo. ...birds.cornell.edu ... Black…
