How to identify the American Coot

To correctly identify the American Coot (Fulica americana), 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

34-43 cm (13-17 in)

Wingspan

58-71 cm (23-28 in)

Weight

427-848 g (15.1-29.9 oz)

Physical features to check

1. 1

   Plumage

   Overall feather coloration and pattern.

   Adults have a sooty gray to black body plumage, with a slightly paler gray head and neck. The undertail coverts are white, often visible when the bird is swimming or walking. The wings are dark, with a narrow white trailing edge that is most noticeable in flight.

2. 2

   Beak shape

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

   Conical, ivory-white bill with a dark band near the tip. A prominent, fleshy, white frontal shield extends from the base of the bill onto the forehead.

3. 3

   Eye color

   Iris color and any distinctive eye markings.

   Dark red to reddish-brown.

4. 4

   Leg color

   Leg and foot color.

   Yellowish-green to olive-green legs and feet. The feet are large and lobed, not fully webbed like ducks, which aids in both swimming and walking on land.

5. 5

   Distinguishing features

   Standout features that separate this species.

   The most distinctive features are the bright white bill and frontal shield, and the lobed feet. They also exhibit a characteristic head-pumping motion while swimming.

6. 6

   Juvenile appearance

   How young birds differ from adults.

   Juveniles are paler gray-brown overall, with a whitish throat and breast. Their bill is duller, often grayish, and the frontal shield is smaller and less developed, sometimes pinkish or yellowish. They lack the reddish eye color of adults.

7. 7

   Seasonal changes

   Plumage variation between breeding and non-breeding seasons.

   No significant seasonal plumage changes. The brightness of the frontal shield may vary slightly with breeding condition.

8. 8

   Sexual dimorphism

   How males and females differ.

   Males and females are generally monomorphic in plumage, though males tend to be slightly larger than females. During breeding season, the frontal shield of males may appear slightly larger and more prominent.

Key field marks

• Bill and Frontal Shield. Look for the distinctive ivory-white bill with a dark band near the tip, and the prominent white frontal shield extending onto the forehead. This is the most reliable field mark.
• Plumage Color. Observe the overall sooty gray to black body plumage, with a slightly paler head and neck. Note the white undertail coverts, especially when the bird is swimming or preening.
• Legs and Feet. If visible, note the yellowish-green legs and large, lobed (not fully webbed) feet. These are unique among common North American water birds.
• Swimming Behavior. Watch for the characteristic head-pumping motion while swimming. They often dive for food, disappearing for several seconds before resurfacing.
• Flight. In flight, look for the dark body, rapid wingbeats, and the narrow white trailing edge on the secondary feathers, along with the white undertail coverts.
• Vocalizations. Listen for their distinctive sharp, explosive 'keks' or 'piks', especially when alarmed or interacting with other coots.

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