BIOL 1902 Lecture Notes - Lecture 17: Ruffed Grouse, Hooded Merganser, Lek Mating
15 Aug 2018
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Document Summary
Grooves with 4 grooves show older age: wo(cid:374)"t (cid:373)ate (cid:449)ith less tha(cid:374) 2 groo(cid:448)es. Moose/deer: antlers males change with size and age of moose. Indicates age = maturity: antler points = tines flat part = palm, they shed them every year and grow back each spring. Dobsonfly: lives in water for a year then emerge as adult to mate. Large tusks only for mating: ritualized displays. Hooded merganser: white patch on the head and they put the crest upright like a hat in mating season. Ruffed grouse: neck ruff fluff and tail displays. Male midges: fly in swarms to mate. Damsel fly: ebony jewel wing: female has white dot end of body has clasps that hold the female. Male curls abdomen over to put sperm in sperm tool that gets it to female. Swans: choreographed things where each mate tries to match one another. Sandhill cranes: jumps up and down and tucks head.
