BIOL 1902 Lecture 24: Last class/ Nest Defence Cont.
9 Feb 2019
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Document Summary
Distraction displays are when certain birds lead the predators away from the nest. Rodent run is when small ground birds run in multiple directions and circles to lead predators away from the nest. Feigned injury is the act of pretending to have an injury to lure predators away from the nest. Ducks do this, it is called a broken wing act. Killdeer do this, it is called a simulated wound, they have red patterns to look like blood. Ducks form creches (brood amalgamation), one female drops off her young to another female, providing safety in numbers and a higher survival chance of the female"s young. Facultative brood parasites are animals that rely on other animals to raise their young. Intraspecific is when facultative brood parasites occur within the parasite"s own species. Interspecific is when facultative brood parasites occur within different species. Mergansers (ducks) do egg dumping is when a duck dumps its eggs in another female duck"s nest.
