WITH reference to the note (antea, p. 54) on this topic, in June, 1949, an Arctic Tern (Sterna macrura) made repeated stoops at my companion, Dr. H. K. Whitehouse, while he was standing by the bank of the river in Hvalfjordur a few yards from our camp in Iceland. I have no doubt that this behaviour should be regarded as incomplete mobbing, for it was essentially similar to that of breeding Arctic...

Stay at the forefront of British birding by taking out a subscription to British Birds.

Subscribe Now