EEB386H1 Lecture Notes - Lecture 8: Peafowl, Northern Cardinal, Wingspread
14 Apr 2017
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Courtship diversity: song (acoustic, dance (visual, song & dance, dance & sounds, nuptial gifts, built structures. Song-spread display red-winged black bird: song display, song used in 2 ways for males, territoriality, courtship, wing-spread, combination of song and plumage display. Eucalyptus forest songbirds: very complex songs, makes display arena that it maintains. Club-winged manakin: knocks wings at rate no mammal can do (special muscle physiology: feathers bent so that they"re tuned to frequency of sound, like tuning forks, 1500 cycles per second. Courtship feed - northern cardinal: nuptial gifts, males often feed females, female uses chick-begging display to be fed, chicks usually flap wings and open mouth. The sight of a feather in a feather in a peacock"s tail, whenever i gaze at it, makes me sick . Darwin quote: how is this huge tail helpful in terms of survival, natural selection = variation in survival + reproduction, but eventually found that display = part of reproductive success.
