Food: Ivory-billed woodpeckers could be of economic importance except for their small numbers (Greenway 1958). The woodboring larvae making up a third of their diet (Beal 1911) are injurious to trees (Pearson 1936), and are most abundant in areas where recently dead and dying trees are numerous because of flooding, fire, insect attacks, or storms. The birds stay as long as there are abundant larvae (Dennis 1967). They also eat fruit of magnolia and pecan trees (Beal 1911). Sulphur-bellied flycatcher _Myiodynastes luteiventris_ L 6¾″ [Illustration] Habitat: The sulphur-bellied flycatcher is a common occupant of riparian habitat with sycamore trees in deep canyons from 5,000 to 7,500 feet elevation in the Huachuca Mountains of Arizona. Nest: Invariably the nest of this species, made from leaf stems (Peterson 1961), is built in a natural cavity in a large sycamore at a height between 20 and 50 feet above the ground. The cavity normally is a knothole where a large branch has broken off (Bent 1942). At least one member of each pair may return to the same nest site each year. Food: Little information has been published on the food habits of this flycatcher, but insects caught in the air are undoubtedly the major items. Apparently small fruits and berries also are eaten (Bent 1942). Great crested flycatcher _Myiarchus crinitus_ L 7″ [Illustration] Habitat: Great crested flycatchers are common in deciduous and mixed woods east of the Rockies. They were originally a deep forest bird, but with increases in forest clearing and thinning operations, fewer and fewer cavities are available. They seem to be adapting well to less densely forested areas, areas treated with herbicides, and forest-field edge situations (Hespenheide 1971, Bent 1942). Nest: Great crested flycatchers use natural cavities or excavations made by other species. Nests are found in a variety of tree species anywhere from 3 to 70 feet above the ground (mostly below 20 feet). They build a bulky nest, and therefore prefer deep cavities. Before constructing a nest, they will generally fill a deep cavity with trash to a level of 12 to 18 inches from the top. They are well known for their habit of including a snake skin in the nest or dangling it from the cavity opening (Bent 1942). Food: Food habit studies have shown that great crested flycatchers eat 94 percent animal and 6 percent vegetable material. Most frequently eaten are butterflies, beetles, grasshoppers, crickets, katydids, bees, and sawflies. Vegetable matter is mainly wild fruits. Most food is caught in flight in the usual flycatcher fashion (Bent 1942). Wied’s crested flycatcher _Myiarchus tyrannulus_ L 7¼″ [Illustration] Habitat: Desert saguaros, deciduous woodlands and riparian vegetation in the Southwest are the preferred habitats of the Wied’s crested flycatcher.