Foot of Grebe

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“In this foot each toe is provided with its swimming membrane; the membrane being closed when the foot is flexed, and expanded when the foot is extended."—Pettigrew, 1874


Bird Anatomy


Pettigrew, J. Bell Animal Locomotion (New York, NY: D. Appleton & Company, 1874)


TIFF (full resolution)

1750×2400, 892.4 KiB

Large GIF

746×1024, 135.6 KiB

Medium GIF

466×640, 71.9 KiB

Small GIF

233×320, 24.3 KiB