A C C O R D I N G TO C U L L E N (i960), the various tern species breeding in Britain, adopt different methods of protecting their territories from predators. The Sandwich Tern Sterna sandvicensis, which is not much inclined to attack intruders to the colony, often nests amongst more pugnacious species and relies on their mobbing for the protection of its own territory; furthermore, this species i...

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