Food: No published information was found, but the diet is probably similar to that of other members of this genus. All live in similar habitats and spend much of their time foraging in crevices in the bark, on the trunks, and on branches, presumably hunting for adults, larvae, and eggs of insects (Bent 1946). White-breasted nuthatch _Sitta carolinensis_ L 5″ [Illustration] Habitat: White-breasted nuthatches are non-migratory in most forest types in the United States. They show a preference for deciduous woodlands. In the Rocky Mountains, they occur most commonly below 9,500 feet elevation (Bailey and Niedrach 1965). Nest: White-breasted nuthatches nest almost exclusively in natural cavities within living trees of mature forests. When natural cavities are unavailable, they may use an abandoned woodpecker hole (Kilham 1968b). In the West, nests have been found in dead aspens and dead portions (lightning strikes) of live ponderosa pines (Bailey and Niedrach 1965, Scott and Patton 1975). Nests are lined with hair and feathers and are often used for more than 1 year. Food: A myriad of insects, including larvae of the gypsy moth and the forest tent caterpillar, beetles, spiders, caterpillars, and ants comprise the main diet of white-breasted nuthatches throughout the spring and summer. In the winter, nearly all food eaten is mast composed of beechnuts, acorns, hickory nuts, maize and sunflower seeds (Bent 1948). Among the insect foods are several other forest pests including nut weevils, locust seed weevils, and roundheaded woodborers (Scott and Patton 1975). Nuthatches may also be attracted to feeders with suet and sunflower seeds. Red-breasted nuthatch _Sitta canadensis_ L 4″ [Illustration] Habitat: Red-breasted nuthatches nest throughout the high elevations of the Rocky Mountains and in the Canadian boreal forests. They are erratic winter migrants to the eastern forest types. In Colorado, their preferred habitat is the coniferous-aspen type from the Canadian Life Zone to timberline. Nest: Red-breasted nuthatches will excavate their own cavity if a natural cavity or woodpecker hole is not available or to their liking (de Kiriline 1952). Nests are usually 6 to 40 feet above the ground in rotten stubs or branches of dead trees. Nests have been reported in birch, poplar, cottonwood, oak, and pine. Nests usually are not lined, in contrast to those of white-breasted nuthatches. Food: Little is known of the food taken by red-breasted nuthatches. They feed on seeds of pine, spruce, and other coniferous trees. The animal food is known to include beetles, hymenoptera, spiders, and ribbed pine borers. They sometimes feed on flying insects (Bent 1948). Birds will visit feeders offering suet during the winter. Brown-headed nuthatch _Sitta pusilla_ L 3½″ [Illustration]