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In page Swan:

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Young swans are known as cygnets, from Old French cigne or cisne (diminutive suffix et 'little'), from the Latin word cygnus, a variant form of cycnus 'swan', itself from the Greek κύκνος kýknos, a word of the same meaning.[5][6][7] An adult male is a cob, from Middle English cobbe (leader of a group); an adult female is a pen.[8] A group of swans is called a bevy[citation needed] or a wedge.[9]