BIOL 1902 Lecture Notes - Lecture 23: House Finch, Siblicide, Parental Investment

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Incubation (sitting on egg to keep it a warm constant temp. ) is a parental investment by birds, by sitting on the eggs. Birds have brood patches (stomach) which are loose bits of skin that are placed on the egg when it is being incubated. In phalaropes, males develop brood patches and incubate. In most other species, the females develop brood patches and incubate. Ducks and grouse develop brood patches and so incubate, since the males leave after mating. Hummingbirds develop brood patches and so incubate. Songbirds develop brood patches and so incubate. House finch develop brood patches and so incubate. In some species, both the male and female develop brood patches and incubate. In killdeer, males do the night shift of incubation, females do the day shift. In northern flickers (woodpecker), males do the night shift, females do the day shift. Clutch is a group of eggs of a single bird.

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