Nesting.

Cassin’s Kingbirds eat insects, and occasionally berries. It also eats berries and fruits in lesser quantities. Cassin's Kingbird: Call is a loud "chi-beer" or rapid "chi-beer, ch-beer-beer-beer-r-r." Similar Species Cassin's Kingbird: French: Tyran de Cassin: Icelandic: Skrækhersir: Japanese: ... diet, sounds, behavior, breeding, current population status, and conservation. Dark tail with a pale/buffy color at the tip of the tail. It occasionally eats fruits.

An eye-catching bird with ashy gray and lemon-yellow plumage, the Western Kingbird is a familiar summertime sight in open habitats across western North America. Can be easily confused with the Western Kingbird.
Usually forages on the wing. This large flycatcher sallies out to capture flying insects from conspicuous perches on trees or utility lines, flashing a black tail with white edges. Habitat: Residential areas, Grassland, Oak/Chaparral, Pinyon/Juniper, Time of year: Spring, Summer Relative Abundance: Common in appropriate habitat and season. Habitat/ Plant community used by the Cassin's kingbird.

Alfalfa and livestock pastures provide a plentiful diet of insects. The Cassin's kingbird prefers open woodlands with understory.

Its scientific name describes its aggressive, domineering behavior toward potential predators and rivals of its own species, and its loud, frequent vocalizations. Behavior. Calls / Vocalizations

This kingbird caught several crabs afterwards displaying the same behavior. Robert C. Tweit and Joan C. Tweit Version: 1.0 — Published March 4, 2020 Text last updated January 1, 2000 Also eats some spiders and millipedes, and regularly eats small numbers of berries and fruits. This opens in a new window. Nests in lightly wooded to open areas.

Others may have witnessed something similar before, but I would expect that vertebrate prey are relatively rare items in their diet. Feeds on a wide variety of insects, especially wasps, bees, beetles, and grasshoppers, also flies, true bugs, caterpillars, moths, and many others. It is associated The Western Kingbird has benefited from the cutting of forests. The call is a high-pitched shorter followed by a longer chirp, sounding like chi-beer. A disjunct population breeds in eastern Wyoming and surrounding areas. Diet Mostly insects, some berries. Cassin’s Kingbird breeds from southern California east through southern Nevada, southern Utah, Arizona, southern Colorado, and New Mexico to western Texas, and south through Mexico (Tweit and Tweit 2000).

Their scientific name "vociferans" comes from their noisy, repetitive morning song. Vocalization. This species was originally known as the Arkansas Kingbird, but its name was changed to be more descriptive and to adapt to common usage.