EXTERNAL DIFFERENCES BETWEEN NEWLY HATCHED CUCKOOS (COCCYZUS AMERICANUS AND C. ERYTHROPTHALMUS

Black-billed Cuckoo (Coccyzus erythropthalmus) Science Article 3

abstract

Yellow-billed Cuckoos (Coccyzus americanus) and Black-billed Cuckoos (C. erythropthalmus), although nonparasitic, do from time to time lay their eggs in the nests of each other and of various passerines

VAL NOLAN, JR., Condor(77)3:341

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