How to identify the American Redstart

To correctly identify the American Redstart (Setophaga ruticilla), check each of these features. Birds can be tricky: habit, habitat, and call often confirm a sighting that a single photo cannot.

Size at a glance

Length

11-13 cm (4.3-5.1 in)

Wingspan

16-20 cm (6.3-7.9 in)

Weight

7-9 g (0.25-0.32 oz)

Physical features to check

1. 1

   Plumage

   Overall feather coloration and pattern.

   Adult males are unmistakable with glossy black plumage, bright orange patches on the sides of the breast, wings, and tail. The belly is white. Adult females and immature males (second-year males) have gray heads, olive-green backs, white underparts, and yellow patches on the sides of the breast, wings, and tail. Immature females are duller overall.

2. 2

   Beak shape

   Shape and color of the bill: a key field mark.

   Small, slender, pointed, and dark gray to black.

3. 3

   Eye color

   Iris color and any distinctive eye markings.

   Dark brown.

4. 4

   Leg color

   Leg and foot color.

   Dark gray to black.

5. 5

   Distinguishing features

   Standout features that separate this species.

   The most distinctive features are the bright orange (male) or yellow (female/immature) patches on the wings and tail, which are prominently displayed during foraging. Their active, fanning tail behavior is also a key identifier.

6. 6

   Juvenile appearance

   How young birds differ from adults.

   Juveniles resemble adult females but are generally duller, with more brownish-gray tones and less vibrant yellow patches. First-year males can be particularly variable, showing a mix of female-like plumage with developing black and orange patches.

7. 7

   Seasonal changes

   Plumage variation between breeding and non-breeding seasons.

   Plumage remains largely consistent between breeding and non-breeding seasons for adult males and females. However, first-year males may undergo a partial preformative molt that brings them closer to adult male plumage, though they often retain some female-like characteristics through their first breeding season.

8. 8

   Sexual dimorphism

   How males and females differ.

   Pronounced sexual dimorphism. Males are black and orange, while females are gray, olive-green, and yellow. Second-year males often resemble females but may show some black feathering or brighter orange patches.

Key field marks

• Plumage (Adult Male). Look for a glossy black body with vivid, fiery orange patches on the sides of the breast, at the base of the primary feathers on the wings, and on the outer tail feathers. The belly is white.
• Plumage (Female/Immature). Observe a gray head, olive-green back, white underparts, and bright yellow patches on the sides of the breast, wings, and outer tail feathers. Immature males may show a mix of black and orange with female-like gray/olive.
• Foraging Behavior. Watch for its characteristic active foraging style: constantly flitting through foliage, sallying out to catch insects, and frequently fanning its tail and drooping its wings to flash its bright patches.
• Size and Shape. Note its small size (typical warbler size) and slender build. The tail is relatively long for a warbler.
• Song. Listen for its high-pitched, clear, whistled song, often ending with an emphatic, slightly buzzy note (e.g., 'swee swee swee SWEE-tsi').
• Call. Listen for a sharp 'chip' note, especially when agitated or during foraging.

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