BIOL 1902 Lecture Notes - Lecture 20: Cedar Waxwing, Bluegill, Damselfly
22 Feb 2017
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Document Summary
Bulls use sparring to determine the better male, and how big their antlers are (stature: size does matter to a female moose. Like song, antlers are a product of sexual selection. Submission is a way to avoid injury, as injury can reduce the performance of a moose during mating, and can also kill the other moose. O(cid:373)eti(cid:373)es the a(cid:374)i(cid:373)als" a(cid:374)tlers (cid:272)a(cid:374) lo(cid:272)k together, a(cid:374)d (cid:271)oth a(cid:374)i(cid:373)als (cid:272)a(cid:374) die. Male dobsonflies have large ornaments during mating season. Ruffed grouse use neck ruffs and tail displays. Some animals use aerial displays: midges use this, for mating purposes, damselflies have aerial displays as well. Male ebony jewelwings perform, and the females will judge them by either clapping their wings over their heads, or laying their wings down flat: fireflies use aerial displays at night. Some birds dance: swans have choreographed (synchronized) mutual displays for courtship. Sandhill cranes performed ritualized dances: sharp-tailed grouse also dance.
