Gecko. Underside of the head and foot of a gecko (family Gekkonidae) walking on glass. Geckos are nocturnal lizards found in warm climates. They are able to climb on vertical walls and upside-down on ceilings due to the gripping ability of their toes. Each toe is lined with microscopic hairs (setae) and each hair is further branched into finer structures (spatulae). The hairs create weak intermolecular forces, known as van der Waals forces, which are strong enough to grip on any surface. Geckos walk by first uncurling their toes before making contact. To take another step, the gecko must peel off its toe. This uncurling and peeling action can be produced up to 15 times per second, enabling the gecko to move rapidly.
© VOLKER STEGER/SCIENCE PHOTO LIBRARY
Perentie monitor lizard eating snake
Richly patterened big Perentie monitor lizard (Varanus giganteus) eating snake in arid habitat of dry scrub and gravel, Watarrka National Park, Northern Territory, Australia
© 2011 Yva Momatiuk and John Eastcott - registered at U.S. Library of Congress Office
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Illustration of Blue Land Crab (Discoplax hirtipes) crawling up tree trunk, and Forest Snail (Anoglypta) gliding over leaves on ground
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84289726, Animal Behavior, Animal Behaviour, Animal Shell, Animal Themes, Anoglypta, Blue Land Crab, Camouflage, Color Image, Crab, Crawling, Discoplax, Discoplax Hirtipes, Fragility, Full Length, Gliding, Ground, Illustration, Illustration And Painting, Leaf, Motion, Natural Pattern, Nature, No People, Rear View, Shell, Side View, Snail, Spiral, Tree Trunk, Two Animals, Vertical, Watercolor Painting, Watercolour Painting, White Background