Duck and Raptor Identification

How to Identify an American Kestrel (Falco sparverius)

Quick answer

American Kestrel, Falco sparverius: 5 field marks, size, habitat and range, and how to tell it from Merlin, quoted from Audubon, Ducks Unlimited and USFWS.

Updated 2026-09-10 · Sources: Audubon

Found one? Take a photo to identify it.

Download on the App Store

What are the key facts?

  • Scientific name: Falco sparverius
  • Group: Falcons
  • Size: Male length 8.7-10.6 in (22-27 cm); Female length 9-12.2 in (23-31 cm)
  • Habitat: Open to semi-open habitat such as grasslands, meadows, forest clearings, farmland, desert, and urban/suburban areas
  • Range in North America: Found continent-wide; northern individuals migrate far south depending on seasonal prey availability, while southernmost populations remain resident
  • Behavior clue: Hovers over fields on rapidly beating wings, watching for prey such as grasshoppers, when no good perch is available

Field marks to check on a American Kestrel

  • Head pattern: Relatively small, long-tailed falcon with two sharp black facial stripes (mustache marks)
  • Body pattern: Female: all red-brown above with narrow dark bars, including on the tail
  • Body pattern: Male: red-brown tail with a black tip, red-brown back contrasting with blue-gray wings
  • Size compared with look-alikes: The smallest falcon in North America
  • Behavior clue: Hovers over fields on rapidly beating wings when no good perch is available, watching for prey

American Kestrel vs Merlin

American Kestrel is smaller with two distinct black facial mustache stripes and a rufous back/tail, while Merlin lacks strong facial stripes and is uniformly streaked below with a banded dark tail The Merlin page lists its own marks.

Where and when to look

Open to semi-open habitat such as grasslands, meadows, forest clearings, farmland, desert, and urban/suburban areas Found continent-wide; northern individuals migrate far south depending on seasonal prey availability, while southernmost populations remain resident

Behavior that helps

Hovers over fields on rapidly beating wings, watching for prey such as grasshoppers, when no good perch is available

How to photograph it for identification

Raptors are usually far away and against the sky, so expose for the bird, not the sky, and take several frames as it turns: the tail shape, wing shape and underwing pattern show best in flight. For a perched bird, get the head and chest in one frame. Size is hard to judge alone; compare with a nearby crow, gull or fence post. The app names the likely species; confirm with the marks above.

FAQ

What does a American Kestrel look like?

Relatively small, long-tailed falcon with two sharp black facial stripes (mustache marks) Female: all red-brown above with narrow dark bars, including on the tail

How do I tell a American Kestrel from a Merlin?

American Kestrel is smaller with two distinct black facial mustache stripes and a rufous back/tail, while Merlin lacks strong facial stripes and is uniformly streaked below with a banded dark tail

How big is a American Kestrel?

Male length 8.7-10.6 in (22-27 cm); Female length 9-12.2 in (23-31 cm)

Where are American Kestrels found?

Found continent-wide; northern individuals migrate far south depending on seasonal prey availability, while southernmost populations remain resident

More in Duck and Raptor Identification

Related

Find out what bird that really is.

Start with a single photo.

Found one? Take a photo to identify it.

Sources

  • Audubonwww.audubon.org/field-guide/bird/american-kestrel

Compiled by the BirdLens editorial team

Every fact on this page is taken from the sources listed above; numbers and prices are copied from the source, and prices name the guide or auction and its date. Research and drafting were assisted by AI, and each claim was then checked against the cited sources. Checked 2026-09-10. We do not buy, sell or grade items; the app identifies what you photograph and points you to these references.

Help us understand what works

With your permission, we use privacy-limited analytics to measure page use and App Store clicks. We do not load analytics or send events unless you allow it.

Read the Privacy Policy