On arid rocky hills CASSIN KINGBIRDS sit quietly on tree tops until insect prey sends them skyrocketing. Often these wild sky dances are not induced by pursuit but seem to be executed by a sudden spasm of internal energy. Their normal behavior is more quiet than the Arkansas Kingbird but at evening they make the valley echo with loud, almost martial, calls.
NEST: similar to Arkansas Kingbird, located on horizontal cottonwood limbs, often on railroad mile posts.
EGGS: 3 or 4; white, splashed with browns.
Western North America from Central California east to Wyoming, Colorado and western Texas.
A tree up to 100 feet high, distributed thruout United States east of Rocky Mountains.