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Lack's principle
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Lack's principle, proposed by the British ornithologist David Lack in 1954, states that "the clutch size of each species of bird has been adapted by natural selection to correspond with the largest nu
Birds lay only as many eggs as they will be able to provide for.
Birds lay only as many eggs as they will be able to provide for.
If there are too many mouths to feed, fewer young will survive, reducing the parents' reproductive fitness.
If there are too many mouths to feed, fewer young will survive, reducing the parents' reproductive fitness.
David Lack
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David Lambert Lack FRS was a British evolutionary biologist who made contributions to ornithology, ecology, and ethology. His 1947 book, Darwin's Finches, on the finches of the Galapagos Islands was a
Lack's principle
…Lack's principle, proposed by the British ornithologist David Lack in 1954, states that "the clutch size of each species of bird has been adapted by natural selection to correspond with the largest number of young for…
The Common Swift, one of many subjects studied by Lack.
The Common Swift, one of many subjects studied by Lack.