var gaJsHost = (("https:" == document.location.protocol) ? Common Cuckoo. Bill is long and wide, and lower mandible is bright yellow. Behavior is similar to other small flycatchers. Evolutionary genetics of flycatchers. document.write(""); Home. Gray kingbird. A. Marten. Partners in Flight estimates a total breeding population of Cordilleran Flycatcher … NPS Photo / Rachel Ames. Found mostly east of the Sierra Nevada and Cascade mountain ranges, the Cordilleran Flycatcher is a common small yellowish flycatcher of shaded forests. Nearly identical in appearance to the Pacific-slope Flycatcher, the two forms were formerly considered to be the same species, known as the "Western Flycatcher." Brown-crested flycatcher. Cassin's kingbird. All Aves-African Penguin. The Cordilleran flycatcher waits on an open perch of a shrub or low branch of a tree and flies out to catch insects in flight , and also sometimes picks insects from foliage while hovering . In some species, like the Vermilion Flycatcher, the display flight is very noticeable and eye-catching. scJsHost+ Also takes some food from foliage or twigs while hovering. Feeding Behavior. Eggs. Cordilleran Flycatcher: Eats insects, berries, and seeds; forages by catching insects in mid-air. Cordilleran Flycatcher populations appear stable or are slightly declining. Behavior: There seems to be nothing peculiar in the behavior of the western flycatcher, as compared with the other small flycatchers of the Empidona~ group. var sc_project=965006; Migratory Birds + Swainson's Hawk. Winters south of U.S.-Mexico border along the Pacific coast of central Mexico. In 1989, the American Ornithologists’ Union split the Western Flycatcher into two species: Pacific-slope Flycatcher (Empidonax difficilis) and Cordilleran Flycatcher (Empidonax occidentalis), on the basis of vocal differences, differences in allozyme frequencies, and an area of sympatry in the Siskiyou region of northern California, where they were reported to mate assortatively. //