American Kestrels

Location: Wisconsin

Camera Host: Raptor Resource Project

Kestrel Cam is now Offline

After a successful season at the cam site, the young kestrels have been dispersing away from the barn and out into the sea of surrounding habitat. Thanks to everyone who tweeted out their sightings, watched, or shared the kestrels’ journey. We hope to be back next year with our excellent partners at the Raptor Resource Project with more kestrel goodness.

January 08, 2019

American Goldfinches Flock To Cornell Feeders

Dressed in their olive winter plumages, a flock of American Goldfinches arrive one-by-one to fill the open seats in front of the Cornell FeederWatch cam. Did you know American Goldfinches are the only finch that molts its body feathers twice a year, once in late winter and again in late summer? Get a close look before a larger visitor steals the spotlight! 

January 06, 2019

Rufous Motmot Nips Variegated Squirrel That Comes Too Close

In an interesting interspecies interaction, a Rufous Motmot lets a Variegated Squirrel know how close is too close on the Panama fruit feeders.  

January 08, 2019

American Goldfinches Flock To Cornell Feeders

Dressed in their olive winter plumages, a flock of American Goldfinches arrive one-by-one to fill the open seats in front of the Cornell FeederWatch cam. Did you know American Goldfinches are the only finch that molts its body feathers twice a year, once in late winter and again in late summer? Get a close look before a larger visitor steals the spotlight! 

January 06, 2019

Rufous Motmot Nips Variegated Squirrel That Comes Too Close

In an interesting interspecies interaction, a Rufous Motmot lets a Variegated Squirrel know how close is too close on the Panama fruit feeders.  

July 14

Last Kestrel Chick Takes Flight From The Nesting Box!

Nearly five hours after its sibling left the box at 6:05 AM, the final American Kestrel chick took wing at 11:44 AM and joined its siblings in the wild world outside of the nesting box! All four chicks have now fledged, and the nesting box is empty. The age of the chicks at fledging ranged from 26–29 days post-hatch. Thanks to our partners at the Raptor Resource Project and to everyone for watching and learning along with us as these tiny falcons grew from fluffballs to fledglings. Good luck out there little ones!  More...

July 14

American Kestrel Chick Fledges!

One of the American Kestrel chicks fledged first thing this morning! Watch one of the younger male chicks take his first flight at 6:05 AM on July 14. At least one male chick remains in the nest after two chicks likely fledged sometime on July 13. More...

American Kestrel

Cavity

Nest Placement

American Kestrels nest in cavities, although they lack the ability to excavate their own. They rely on old woodpecker holes, natural tree hollows, rock crevices, and nooks in buildings and other human-built structures. The male searches for possible nest cavities. When he’s found suitable candidates, he shows them to the female, who makes the final choice. Typically, nest sites are in trees along wood edges or in the middle of open ground. American Kestrels take readily to nest boxes (see Backyard Tips).

Nest Description

American Kestrels do not use nesting materials. If the cavity floor is composed of loose material, the female hollows out a shallow depression there.

Clutch Size

4-5 eggs

Incubation Period

26-32 days

Nestling Period

28-31 days

Egg Description

White to yellowish or light reddish-brown, mottled with violet-magenta, gray, or brown.

Condition at Hatching

Feeble, with sparse white down over pinkish skin; eyes partially open by first or second day.

Insects

Food

American Kestrels eat mostly insects and other invertebrates, as well as small rodents and birds. Common foods include grasshoppers, cicadas, beetles, and dragonflies; scorpions and spiders; butterflies and moths; voles, mice, shrews, bats, and small songbirds. American Kestrels also sometimes eat small snakes, lizards, and frogs. And some people have reported seeing American Kestrels take larger prey, including red squirrels and Northern Flickers.

Typical Voice

American Kestrels have a fairly limited set of calls, but the most common one is a loud, excited series of 3-6 klee! or killy! notes lasting just over a second. It’s distinctive and an excellent way to find these birds. You may also hear two other common calls: a long whine that can last 1–2 minutes, heard in birds that are courting or feeding fledglings, and a fast chitter, usually used by both sexes in friendly interactions.more sounds

See full Species Info at All About Birds

About the Kestrels

In general, the kestrels return to their box in February or March. Egg-laying begins in April or May, and eggs hatch roughly 26 to 32 days after they are laid. The young fledge between 28 and 31 days of age. Like peregrine falcons and bald eagles, American kestrel fledglings remain near the nest before dispersing in late summer. They eat invertebrates, small rodents, and birds including grasshoppers, cicadas, beetles, dragonflies, spiders, butterflies and moths, voles, mice, shrews, small songbirds, small snakes, lizards, and frogs. Learn more about American Kestrels in our species guide.

About the Site

The kestrels are nesting on private property near Prairie Du Chien, Wisconsin. Their nest box, located on the side of a traditional limestone-footed barn, overlooks a rolling grassland that slopes away into the folded hills and forests of the driftless. A nearby stream cuts through deeply incised limestone to join the Mississippi river roughly four miles west of the nest. This wonderful combination of grassland, forest, and water has supported kestrels for over 25 years, and is an excellent example of the habitat that kestrels need to survive and thrive.

About the Host

Founded in 1988 by the late Bob Anderson, the non-profit Raptor Resource Project specializes in the preservation of falcons, eagles, ospreys, hawks, and owls. They create, improve, and directly maintain over 50 nests and nest sites, provide training in nest site creation and management, and develop innovations in nest site management and viewing that bring people closer to the natural world. Their mission is to preserve and strengthen raptor populations, expand participation in raptor preservation, and help foster the next generation of preservationists.