BIOL 1902 Chapter Notes - Chapter 1: American Bittern, Countershading, Sensory System
25 Jul 2014
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Week 1 3 - introduction - staying alive (chapter one: behavioural and chemical defences of animals continued. Darker) (i. e. whirligigs, ) (countershading aka obliterative shading only works when animal is not moving: masquerade: ability to escape recognition (many parts of plants dead/alive. Are replicated well by insects) can imitate an inanimate object twig. Some animals create own masquerade by adding camouflage material to body (i. e. treehoppers, green-patched looper: startle pattern (bright colours): unexpected emergence of markings to shock predators (i. e. sphinx moth wings looking like fake eyes, red-bellied snakes). Bright colours also serve a second purpose act as a distraction or deflection patterns to direct a predator"s attack to a non-vital body part (i. e. five-lined skinks tail) Mimicry (batesian mimicry: a harmless animal, the mimic. Resembles another animal, the model, that is toxic (i. e. viceroys are almost identical copies of monarchs one poisonous and other is not)
