Foot of Great Crested Grebe (Anton Reichenow 1913).jpg
Anton Reichenow (1847-1941)
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Foot of Great Crested Grebe (Anton Reichenow 1913), Illustration of bird foot (grebe) from 1913
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Foot of Great Crested Grebe (Anton Reichenow 1913), Illustrations of bird feet
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グレートクレステッドの足
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カンムリカイツブリの足
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bird's foot great crested grebe heterodactyl foot heterodactyl zygodactyl foot rule