Anatomical observations on the bill of the oystercatcher (Haematopus ostralegus occidentalis) in relation to feeding behaviour
Heppleston, P.B. (1970). Anatomical observations on the bill of the oystercatcher (Haematopus ostralegus occidentalis) in relation to feeding behaviour. J. Zool. (1965) 161: 519-524
In: Journal of Zoology (1965). Academic Press: London. ISSN 0022-5460, more
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