American Tree Sparrow (Spizella arborea) (June 5, 2007)
A common bird of deciduous forests and wooded suburbs, the White-breasted Nuthatch (Sitta carolinensis) can be seen hopping headfirst down the trunks of trees in search of insect food. It frequents bird feeders and takes sunflower seeds off to the side of a tree, where it wedges them into a crevice and hammers them open.In winter, the White-breasted Nuthatch joins foraging flocks led by chickadees or titmice. One explanation for these flocks is that the birds gain protection from predators by the vigilance of the other birds. In support of this idea, one study found that if titmice were removed from a flock, nuthatches were more wary and reluctant to come to exposed bird feeders.The White-breasted Nuthatch is normally territorial throughout the year, with pairs staying together. The male is more vigilant when he forages alone than when he is with the female. The female, however, is in danger of having the more dominant male displace her from foraging sites, and she is more vigilant when he is around than when she is alone. (June 5, 2007)
Tufted Titmouse (Baeolophus bicolor) (June 5, 2007)
