Feather Colors Affect Bird Physiology, Barn Swallows Show
Monday, June 2, 2008 - 22:14
in Biology & Nature
In the world of birds, where fancy can be as fleeting as flight, the color of the bird apparently has a profound effect on more than just its image. A new study of barn swallows reveals it also affects the bird's physiology. A manipulation of breast feather color results in higher testosterone levels for male barnswallows.