(Fair Isle Bird Observatory) IT IS well-known from the work of Makkink (1942) and Edwards et al. (1948) that in certain situations the Oyster-catcher (Hcematopus ostralegus) adopts a " pseudo-sleeping " attitude. The bird stands on one or both legs, with the bill plunged into the scapulars, closely simulating the normal resting pose of wading-birds, but the eyes remain wide open and the bird is obvi...

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