How to identify the Black-headed Ibis

To correctly identify the Black-headed Ibis (Threskiornis melanocephalus), 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

65-76 cm

Wingspan

110-125 cm

Weight

1.3-1.8 kg

Physical features to check

1. 1

   Plumage

   Overall feather coloration and pattern.

   Adults are predominantly white with a bare, black head and neck. The back of the neck and upper mantle may show some greyish-black feathering. During the breeding season, some individuals develop greyish scapulars and tertials, and a yellowish patch on the breast.

2. 2

   Beak shape

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

   Long, slender, and strongly decurved (downward-curving) black bill.

3. 3

   Eye color

   Iris color and any distinctive eye markings.

   Dark brown eyes.

4. 4

   Leg color

   Leg and foot color.

   Dull black legs and feet.

5. 5

   Distinguishing features

   Standout features that separate this species.

   The combination of pure white body plumage, bald black head and neck, and long, decurved black bill is distinctive. No other ibis in its range shares this exact combination.

6. 6

   Juvenile appearance

   How young birds differ from adults.

   Juveniles have a feathered, dusky-brown head and neck, often with some white streaking. Their plumage is duller white, and the bill is shorter and less decurved than adults. They gradually acquire adult plumage over their first year.

7. 7

   Seasonal changes

   Plumage variation between breeding and non-breeding seasons.

   During the breeding season, adults may develop a yellowish wash on the breast and some greyish plumes on the scapulars and tertials. These features are less pronounced or absent in non-breeding plumage.

8. 8

   Sexual dimorphism

   How males and females differ.

   Males and females are generally monomorphic in plumage and size, though males may be slightly larger on average.

Key field marks

• Plumage. Look for the striking pure white body plumage. Any other ibis in its range will have different coloration or markings.
• Head and Neck. The bare, glossy black head and neck are unmistakable. This 'bald' appearance is a key identifier.
• Bill. Observe the long, slender, and distinctly decurved (downward-curving) black bill. This specialized bill shape is used for probing.
• Legs. Note the dull black legs and feet, which contrast with the white body.
• Behavior. Watch for its characteristic foraging behavior of wading in shallow water and probing the mud. Often seen in flocks.

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