HELLEBREKERS WPJ (1971) Oölogische nidologische and announcements in 1971 (and earlier). Cuckoo Cuculus canorus conducted by Winter Wren. LIMOSA 44 (3): 196-196.

Common Cuckoo Cuculus canorus Winter Wren Troglodytes troglodytes Cuckoo Cuculus canorus conducted by Winter Wren

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