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A male approaches a female from a snowy field, and it is a display of pose of courtship.
A peacock raises a tail feather and opens it full.
A male Lagopus mutus also widens a tail feather in form of a folding fan full.
The crest that a male is red in sexual excitement expands very much.
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Copyright (c) Shinji Ochi. No reproduction or republication without written permission.