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
Marbled Velvet Gecko – Oedura marmorata
A nocturnal hunter that can climb with ease on vertical and overhanging surfaces, this large gecko feeds on insects and even smaller lizards. Marbled Velvet Geckos are specially adapted to their dry conditions and can go for long periods without food or water.
© 2015 Western Australian Museum
Gecko, Green, Lizard, Marbled, Marmorata, Nocturnal, Oedura, Reptile, Terrestrial, Velvet, White, X Ray
Jacky lashtail, Amphibolurus muricatus
Jacky lashtail, Amphibolurus muricatus, and Cape dwarf gecko, Lygodactylus capensis.. Handcolored copperplate stipple engraving from Jussieu's Dictionnaire des Sciences Naturelles 1816-1830. Illustration by J.G. Pretre, engraved by Massard, directed by Turpin, and published by F. G. Levrault. Jean Gabriel Pretre (1780-1845) was painter of natural history at Empress Josephine's zoo and later became artist to the Museum of Natural History.
© Florilegius / Mary Evans