BIOL 1902 Study Guide - Final Guide: Blister Beetle, Papilio Cresphontes, Aggressive Mimicry
16 Feb 2018
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Camouflage: form of concealment, common form of defense. Background matching: animals appearance resembles its immediate surroundings. Vertical stripes on american bittern help it hide in tall vegetation: even more effective when animal remains cryptic. Forests are home to animals on the floor (grouse), in the trees (screech owls, Grey tree frogs), etc: appearance resembling bark or lichen are beneficial. Grey tree frogs can change from grey to green depending on the colour of the tree they"re on. Disruptive colouration: can take the form of distinctive markings and patterns on body, song birds have dark eye bands to disrupt the shape of the head. Canada geese have chinstraps: coincidence disruptive patterns: leopard frogs. Chipmunks and raccoons exhibit disruptive bands as well. Bicolouration: half the body is dark, half the body is light. Whirligigs must be masked from above and below: birds also use it, the shadow from the body covers the light belly.
