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Natural selection causes early migration and shorter parental care for shorebirds

BIOLOGY | Article

by: M. Hrynkiewicz

The paper shows that in the years when peregrine migration begins early, the early-migrators appear to cut short their breeding activities, presumably to beat the onrush of raptors. Meanwhile, those species that migrate later do not need to shorten their nesting season. This proves inherent conflict all migratory birds face between trying to produce as many offspring as possible while still maximizing their own survival.

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