SCHEENSTRA W (1965) Oölogische nidologische and Communications, 1964 (and earlier). cuckoo Cuculus canorus in nest of a Blue Tit Parus caeruleus. LIMOSA 38 (1): 87-87.
cuckoo Cuculus canorus in nest of a Blue Tit Parus caeruleus Common Cuckoo Cuculus canorus Blue Tit Cyanistes caeruleus
