Nest: Nests made from twigs, weeds, and trash are built in abandoned woodpecker holes in saguaro cacti at a height from 5 to 20 feet above the ground. Sycamores, cottonwoods, and fence posts are used occasionally (Bent 1942). Food: The diet of this species is similar to that of other crested flycatchers, consisting mostly of beetles, flying insects, and perhaps some berries and fruits (Bent 1942). Ash-throated flycatcher _Myiarchus cinerascens_ L 6½″ [Illustration] Habitat: The ash-throated flycatcher occupies dense mesquite thickets, oak groves, saguaro cactus, riparian vegetation, and pinyon-juniper forests. It ranges from Washington to the southwestern United States and Texas. Nest: The ash-throated flycatcher is not particularly specific in tree selection as long as it has a cavity. Woodpecker holes, exposed pipes, and nest boxes have been used. Mesquite, ash, oak, sycamore, juniper, and cottonwood are common nest trees (Bent 1942). Food: The diet of this species consists mainly of animal material. Beetles, bees, wasps, bugs, flies, caterpillars, moths, grasshoppers, spiders, etc., make up about 92 percent of the diet. Mistletoe, berries, and other fleshy fruits account for the remainder (Bent 1942). Olivaceous flycatcher _Myiarchus tuberculifer_ L 5¾″ [Illustration] Habitat: Olivaceous flycatchers are found in dense oak thickets, pinyon-juniper forests, and along canyon streams in Arizona and southwestern New Mexico. Nest: Nests are located in natural cavities or abandoned woodpecker holes. Oaks are preferred, but nests also have been reported in ash and sycamore trees (Bent 1942). Food: Limited evidence on food habits of this species indicates that the major food items are small insects including grasshoppers, termites, mayflies, treehoppers, miscellaneous bugs, moths, bees, wasps, and spiders (Bent 1942). Western flycatcher _Empidonax difficilis_ L 5″ [Illustration] Habitat: Moist deciduous or coniferous forests and areas near running water with tall trees are favored by the western flycatcher (Grinnell and Miller 1944). Nest: Western flycatchers sometimes nest in cavities, but use a variety of nest sites. Davis et al. (1963) found four nests in natural cavities in willows and oaks, and six behind flaps of bark in sycamores and willows. Nests are often reported in natural rock crevices, on tree limbs and crotches, and on ledges of buildings (Bent 1942, Davis et al. 1963, Beaver 1967). Food: Almost all of the food of the western flycatcher is insects captured on the wing. An examination of 23 stomachs showed 31 percent flies, 25 percent beetles, 23 percent lepidopterans (including pupae and adults of spruce budworms), and 17 percent hymenopterans (Beaver 1967). Violet-green swallow _Tachycineta thalassina_ L 4¾″ [Illustration]