Portions of Male Sparrow Brains Grow when Birds Paired with Females
University of WashingtonA new study indicating that portions of bird brains enlarge in response to social factors adds to the mounting evidence that the brains of higher animals change over time. A University of Washington researcher reported that parts of the brains of male sparrows housed with females enlarged 15 to 20 percent larger than brains of other birds housed with males or in isolation