Feeding Behavior

Hunts mostly by watching from a high perch, then swooping down to capture prey. Sometimes, especially when no good perch available, hovers over fields to watch for prey. May pursue and catch insects, birds, or bats in flight. Individual kestrels often specialize on one particular kind of prey.

Eggs

4-6, rarely 2-7. White to pale brown, usually spotted with brown and gray. Incubation is by both parents, usually 28-31 days. Young: Female remains with young most of time at first, while male brings food; after 1-2 weeks, female hunts also. Age of young at first flight about 28-31 days. Parents continue to feed young up to 12 days after fledging; later, these juveniles may gather in groups with young from other nests.

Young

Female remains with young most of time at first, while male brings food; after 1-2 weeks, female hunts also. Age of young at first flight about 28-31 days. Parents continue to feed young up to 12 days after fledging; later, these juveniles may gather in groups with young from other nests.

Diet

Mostly large insects; also some small mammals, birds, reptiles. Grasshoppers are among the favored prey, but many other large insects are taken, including beetles, dragonflies, moths, caterpillars, others. Also feeds on mammals (including voles, mice, and sometimes bats), small birds (sometimes up to the size of quail), lizards, frogs, earthworms, spiders, crayfish, other items.

Nesting

During courtship displays, female flies slowly with stiff, fluttering wingbeats, the wings held just below horizontal. Male repeatedly flies high, calling, and then dives. Male brings food for female, passes it to her in flight. Nest site is in cavity, usually in dead tree or snag, sometimes in dirt bank or cliff, or in old magpie nest. In southwest, often in holes in giant cactus. Also uses artificial nest boxes. Sites usually 10-30' up, but may be at any height.