Cuckoos

The coo coo coo call of the Yellow-billed Cuckoo (June, NJ).












The knocker call (June, NJ).












Two Yellow-billed Cuckoos in close interaction made these calls (May, NJ).












This is the typical flight call of the Black-billed Cuckoo, a gurgle, followed in this case by four more notes, perched bird (May, NJ).

time scale increased