Shags laying two clutches Shags Phalacrocorax aristotelis have long been considered capable of producing two broods in one breeding season, but direct evidence of this is lacking (see The Handbook, vol 4; D. A. Bannerman, 1959, The Birds of the British Isles, vol. 8). N o second clutches were recorded by Drs J. C. Coulson and G. R. Potts during their studies of Shags on the Fame Islands, Northumbe...
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