Photos

Vertebrate Zoology collections at the Smithsonian's National Museum of Natural History

Credit: © Smithsonian Institution

Sometimes individuals with particular trait variations survive and reproduce better than individuals with other variations. Owls hunting in an area with light soil, for example, are more likely to catch dark-colored mice than light-colored mice. Soon, mice with dark coats will disappear from the light soil.

Photos for News Media Use Only


DCSIMG