ONE OF THE tentative conclusions reached in E. J. M. Buxton's paper on this subject (antea, vol. L, pp. 519-526) was that mature Oystercatchers (Haematopus ostralegus) "do not move so far away from their breeding area as immature birds". This conclusion came as something of a surprise in view of the fact that one so often sees Oystercatchers in late summer migrating in family parties. It may be, of c...

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