Chameleon turquoise, and purple. Chameleon skin has a superficial layer which contains pigments, and under the layer are cells with guanine crystals. Chameleons change colour by changing the space between the guanine crystals, which changes the wavelength of light reflected off the crystals which changes the colour of the skin. Colour change in chameleons has functions in camouflage, but most commonly in social signaling and in reactions to temperature and other conditions. The relative importance of these functions varies with the circumstances, as well as the species. Colour change signals a chameleon's physiological condition and intentions to other chameleons. Chameleons tend
Lozenge camouflage nose which indicated his unit, "Jasta" 15. Only the wings and rudder of his Albatros were laid with lozenge camouflage. Similarly, Ernst Udet, the second-highest scoring German ace of World War I, painted his Fokker D.VII bright red with bold white stripes and large white lettering on the rudder reading ""Du doch nicht!!"" ("Definitely not you!!") His aircraft ineffectively retained its lozenge camouflage on the upper surface of the lower wing. Lozenge camouflage Lozenge camouflage was a military camouflage scheme in the form of patterned cloth or painted designs used by some aircraft of the Central Powers in the last