the period 1909-1942 young of the Sandwich Tern (Sterna s. sanivicensis) were ringed in the British Isles to the number of 17,987. Three colonies on the north coast of Norfolk have together made the largest contribution to this total, followed in order of importance by the Fame Isles, off the coast of Northumberland, and by two localities a few miles apart--Ravenglass in Cumberland and Walney Isla...

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