Untitledabout seven inches in the common chameleon. Their hands and feet aresplit so that they grip the branches firmly, and the prehensile tailrivals a monkey's. When they wish they can make themselves very slim,contracting the body from side to side, so that they are not veryreadily seen. In other circumstances, however, they do not practiseself-effacement, but the very reverse. They inflate their bodies, havingnot only large lungs, but air-sacs in connection with them. The throatbulges; the body sways from side to side; and the creature expresses itssentiments in a hiss. The power of colour-change is very remarkable, anddepends partly on the contraction and expansion of the colour-cells(chromatophores) in the under-skin (or dermis) and partly onclose-packed refractive granules and crystals of a waste-product calledguanin. The repertory of possible colours in the common chameleon isgreater than in any other animal except the Æsop prawn. There is a
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Camouflage, Chameleon, prehensile tail, common chameleon, close-packed refractive granules