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Jack Rabbit. The large prominently-veined ears help with both heat gathering (when they spread them to absorb the sun's warmth) and heat elimination (when the veins expand to dissipate excess warmth into the air.)

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Anatomiplancher med dyr / dyrlægeplancher. nemfrog: “ Beginners’ Zoology. 1922. ”

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Evolution by FelineFire.deviantart.com

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Sea turtle embryo anatomy -- Included in book, Sea Turtles of the World, by James Spotilla

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Seeadler

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How To Draw A Cheetah by LCibos.deviantart.com on @deviantART

How To Draw A Cheetah by LCibos.deviantart.com on @deviantART

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Historic Horse Head Gear Part 2 by sketcherjak on DeviantArt

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Pony Anatomy Tips/Study/Tutorial by kilala97 on @DeviantArt

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Fruit bat --- I can't stop looking.

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Beautiful horses

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