BIOL 1902 Lecture Notes - Lecture 2: Geometer Moth, Froghopper, Natural Selection
9 Sep 2017
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Natural selection: animals that did not match the background were eaten first, animals that matched background survived better, peppered moth can change its color based on natural selection. It then passes off its genes to its offspring for better chance at survival. You can find animals on tree trunks since they have different textures and light and dark areas. Mimicry (background matching: animals that match something closely in appearance, animal"s pattern mimics bark on tree, ex: gray tree frog, eastern screen owl. Background matching does not work year-round unless you can change your appearance: ex: gray tree frog, snowshoe hare. Many song birds have eyestripes and eyelines for concealment (disruptive patterns: the stripes on the head are disruptive patterns. Dp helps with breaking up head shape into indiscrete blocks. Near invisible if songbird doesn"t move: killdeer. Especially useful when the bird is on its nest.
