How to identify the African Darter

To correctly identify the African Darter (Anhinga rufa), 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

79-97 cm

Wingspan

110-120 cm

Weight

1.0-1.3 kg

Physical features to check

1. 1

   Plumage

   Overall feather coloration and pattern.

   Adult males are glossy black with a rufous-brown head and neck, featuring a prominent white stripe extending from below the eye down the side of the neck. The back and wings are adorned with silvery-grey streaks and spots. Females are generally duller, with a paler, more greyish-brown head and neck, and less distinct streaking on the back. Both sexes have a long, pointed bill and a long, stiff tail.

2. 2

   Beak shape

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

   Long, straight, and sharply pointed, yellowish to brownish-yellow.

3. 3

   Eye color

   Iris color and any distinctive eye markings.

   Yellow to reddish-brown, surrounded by a patch of bare yellow skin.

4. 4

   Leg color

   Leg and foot color.

   Dull yellow to brownish-yellow, with fully webbed feet.

5. 5

   Distinguishing features

   Standout features that separate this species.

   Extremely long, slender, S-shaped neck; dagger-like bill; long, stiff tail often fanned for balance; habit of swimming with only head and neck visible; distinctive silver-grey streaking on back and wings.

6. 6

   Juvenile appearance

   How young birds differ from adults.

   Juveniles are paler overall, with a brownish-grey plumage, a lighter throat, and less distinct streaking on the back compared to adults. The white neck stripe is often absent or very faint.

7. 7

   Seasonal changes

   Plumage variation between breeding and non-breeding seasons.

   No significant seasonal plumage changes. Breeding plumage is essentially the same as non-breeding, though colors may appear more vibrant during breeding season.

8. 8

   Sexual dimorphism

   How males and females differ.

   Males are generally darker, with a more pronounced rufous neck and a clearer white stripe. Females are paler, with a greyish-brown neck and less distinct markings. Size differences are minimal.

Key field marks

• Neck and Bill. Look for the extremely long, slender, S-shaped neck and the straight, dagger-like bill. This is the most distinctive feature, especially when swimming.
• Swimming Posture. Observe its unique swimming style: often only the head and neck are visible above the water, resembling a snake.
• Plumage (Adult Male). Note the glossy black body, rufous-brown head and neck, and the prominent white stripe running down the side of the neck. Look for the fine silver-grey streaking on the back and wings.
• Plumage (Adult Female). Identify females by their paler, more greyish-brown head and neck, and less distinct white stripe and back streaking compared to males.
• Drying Behavior. Look for darters perched with their wings spread wide, drying their non-waterproof plumage after a dive. This posture is characteristic.
• Tail. In flight or perched, note the long, stiff, fan-shaped tail, which is used for steering and balance.

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