How to identify the Black-chested Snake Eagle

To correctly identify the Black-chested Snake Eagle (Circaetus pectoralis), 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

60-66 cm

Wingspan

160-185 cm

Weight

1.1-2.5 kg

Physical features to check

1. 1

   Plumage

   Overall feather coloration and pattern.

   Adults have a glossy black head, neck, and upper breast, sharply demarcated from the pure white lower breast, belly, and underwing coverts. The upperparts are dark brown to black. The flight feathers (primaries and secondaries) are white with broad black tips and a narrow black trailing edge, forming a distinctive pattern in flight. The tail is short, white with a single broad black subterminal band.

2. 2

   Beak shape

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

   Strong, hooked beak, dark grey to black with a yellow cere.

3. 3

   Eye color

   Iris color and any distinctive eye markings.

   Bright yellow.

4. 4

   Leg color

   Leg and foot color.

   Pale grey to whitish, with strong talons.

5. 5

   Distinguishing features

   Standout features that separate this species.

   The stark contrast between the black chest and white belly is the most prominent field mark. In flight, the white underwing with black tips and trailing edge, and the short white tail with a single black band are diagnostic. The large, bright yellow eyes are also characteristic.

6. 6

   Juvenile appearance

   How young birds differ from adults.

   Juveniles are browner overall, with a streaked rufous-brown head and breast, and often have rufous wash on the underparts. The underwing pattern is similar to adults but may be less sharply defined. The eyes are initially grey-brown, gradually turning yellow with age.

7. 7

   Seasonal changes

   Plumage variation between breeding and non-breeding seasons.

   No significant seasonal plumage changes.

8. 8

   Sexual dimorphism

   How males and females differ.

   Males and females are generally similar in plumage, though females tend to be slightly larger than males.

Key field marks

• Plumage Contrast. Look for the unmistakable sharp contrast between the solid black head, neck, and upper breast and the pure white lower breast and belly. This is the most reliable field mark for adults.
• Underwing Pattern. In flight, observe the underwing: it is predominantly white with broad black tips to the primaries and a narrow black trailing edge on the secondaries. This creates a very clean, two-toned appearance.
• Tail Pattern. The short, white tail with a single, broad black subterminal band is another key identifier, especially visible in flight.
• Eye Color. The large, bright yellow eyes are very distinctive and stand out against the dark head.
• Flight Style. Watch for its characteristic soaring and hovering behavior, often holding its wings in a shallow 'V' shape. This hunting style is typical of snake eagles.

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