Collected reprints: Abstract 3477

Collected reprints

Abstract

Joiris, C. (1973). Observations ornitologiques réalisées dans le sud-est de la Mer du Nord entre juin 1971 et janvier 1972 : 1. Oiseaux marins. [Ornitological observations in the southeastern North Sea between June 1971 and January 1972 : 1. Marine species.]. Bulletin AVES 9(3): 85-137

During three pelagic cruises in the southeastern part of the North-Sea, the author spent a total of 82 hours ( in 41 days) watching birds (Joiris, 1972). Sea bird watching involves only few birds, belonging to non-marine species. Nevertheless, it is a method which enables to point out periods of movement for given populations.


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