HELLEBREKERS WPJ (1977) Oölogische nidologische and announcements in 1975 and 1976: Oystercatcher Haematopus ostralegus breeds on a pole. LIMOSA 50 (1): 62-62.
Oystercatcher Haematopus ostralegus breeds on a pole Eurasian Oystercatcher Haematopus ostralegus
