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Black-backed Gull

Body position
As the name implies, this posture is all about displaying a forward motion by holding the body roughly horizontal or slightly diagonally with the neck kinked characteristically. The tail can sometimes be spread; the bill is either slightly opened or closed. The use of this posture in an aggressive context can be recognized by the carpal joints being raised and the wings lifted from their supporting flank feathers. Lifted wings are an indication that these are ready to be used to strike out with.

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