Duck and Raptor Identification

How to Identify a Merlin (Falco columbarius)

Quick answer

Merlin, Falco columbarius: 5 field marks, size, habitat and range, and how to tell it from Sharp-shinned Hawk, quoted from Audubon, Ducks Unlimited and USFWS.

Updated 2026-09-10 · Sources: Audubon

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What are the key facts?

  • Scientific name: Falco columbarius
  • Group: Falcons
  • Size: 10-14 in (25-36 cm); wingspan 23 in (58 cm)
  • Habitat: Open conifer woodland and prairie groves; also foothills, marshes, and open country during migration
  • Range in North America: Found across Alaska, Canada, and much of the US including California, the Great Lakes, Mid-Atlantic, New England, and the Southwest
  • Behavior clue: Hunts mainly from a perch, flying out to catch prey in the air, or by flying low among trees or over open ground to surprise prey

Field marks to check on a Merlin

  • Body pattern: Female and immature brown above, male blue-gray above; all birds streaked below
  • Tail: Dark tail crossed by narrow whitish bands
  • Size compared with look-alikes: About the size of a Crow or a Robin; relatively short-tailed
  • Flight silhouette: Hunts mainly by watching from a perch then flying out to capture prey in the air, or by flying low among trees or over the ground to surprise prey
  • Wing patch (speculum): Distinguished from Sharp-shinned Hawk, which has similar streaked markings, by its pointed (not rounded) wingtips

Merlin vs Sharp-shinned Hawk

Merlin lacks the American Kestrel's rufous back and tail and strong facial mustache stripes; it is separated from Sharp-shinned Hawk, which has similar streaked markings, by its pointed rather than rounded wingtips The Sharp-shinned Hawk page lists its own marks.

Where and when to look

Open conifer woodland and prairie groves; also foothills, marshes, and open country during migration Found across Alaska, Canada, and much of the US including California, the Great Lakes, Mid-Atlantic, New England, and the Southwest

Behavior that helps

Hunts mainly from a perch, flying out to catch prey in the air, or by flying low among trees or over open ground to surprise prey

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 Merlin look like?

Female and immature brown above, male blue-gray above; all birds streaked below Dark tail crossed by narrow whitish bands

How do I tell a Merlin from a Sharp-shinned Hawk?

Merlin lacks the American Kestrel's rufous back and tail and strong facial mustache stripes; it is separated from Sharp-shinned Hawk, which has similar streaked markings, by its pointed rather than rounded wingtips

How big is a Merlin?

10-14 in (25-36 cm); wingspan 23 in (58 cm)

Where are Merlins found?

Found across Alaska, Canada, and much of the US including California, the Great Lakes, Mid-Atlantic, New England, and the Southwest

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Sources

  • Audubonwww.audubon.org/field-guide/bird/merlin

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.

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