Natural selection at its most powerful winnowed certain finches harshly during a severe drought in 1977. That year, the vegetation withered. Seeds of all kinds were scarce. The small, soft ones ...

The house is a relatively small Carpodacus finch with a longish ... Identifying the male and female house from other Carpodacus finches requires care. The male house differs from the male purple ...

There are now at least 13 species of finches on the Galapagos Islands, each filling a different niche on different islands. All of them evolved from one ancestral species, which colonized the ...