David Lack
Videos
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
The Common Swift, one of many subjects studied by Lack.
Avian clutch size
Videos
Clutch size refers to the number of eggs laid in a single brood by a nesting pair of birds. The numbers laid by a particular species in a given location are usually well defined by evolutionary trade-
David Lack
…major scientific research included work on population biology and density dependent regulation. His work suggested that natural selection favoured clutch sizes that ensured the greatest number of surviving young. This interpretation was however debated by V.C. Wynne-Edwards who suggested that clutch size was…
Great Black-backed Gull (Larus marinus), small clutch.
Red-shafted Northern Flicker: female (left), male (right).
Pied Flycatcher chicks in Finland.
Woodpeckers are capable of excavating their own cavity nests.