Day: February 20, 2016

House sparrow patriarchy

Male house sparrows (Passer┬ádomesticus) are hierarchical, according to Nicholas Lund on the Audubon.org website. The hierarchy depends on the size of the black patch on the breasts of male house sparrows. Breeding male house sparrows have larger black chest badges than non-breeding males. Other… Continue Reading “House sparrow patriarchy”