December 1979 – vol. 72, issue 12, pp 569–573 Recent work on the development of feeding skills by young birds has highlighted the fact that many are less successful than adults at capturing prey (e.g. Orians 1969; Buckley & Buckley 1974). Young Oystercatchers Haematopus ostralegus, for example, take three years to become fully efficient (Norton-Griffiths 1968). Many raptors, in particular, require considerable hunting skill in the face of... This article is only available to registered users.To read more, please log in or purchase a subscription.