HELLEBREKERS WPJ (1963) Oölogy and Nidology communications, 1961-II and 1962: Abnormal eggs of pheasant Phasianus colchius probably in a nest of a partridge Perdix perdix. LIMOSA 36 (1): 109-109.

Abnormal eggs of pheasant Phasianus colchius probably in a nest of a partridge Perdix perdix Common Pheasant Phasianus colchicus Grey Partridge Perdix perdix

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