How to identify the Sulphur-crested Cockatoo

To correctly identify the Sulphur-crested Cockatoo (Cacatua galerita), 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

45-55 cm

Wingspan

90-110 cm

Weight

700-1200 g

Physical features to check

1. 1

   Plumage

   Overall feather coloration and pattern.

   Predominantly white plumage with a distinctive forward-curving, erectile sulphur-yellow crest. The underside of the wings and tail feathers show a pale yellow wash, most noticeable in flight. The feathers around the ear coverts can also have a faint yellow tinge.

2. 2

   Beak shape

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

   Large, powerful, dark grey to black beak, strongly hooked, adapted for cracking hard nuts and seeds.

3. 3

   Eye color

   Iris color and any distinctive eye markings.

   Males typically have dark brown to black irises, while females often have reddish-brown irises. Juveniles have dark irises.

4. 4

   Leg color

   Leg and foot color.

   Dark grey to black

5. 5

   Distinguishing features

   Standout features that separate this species.

   The prominent, erectile sulphur-yellow crest is the most defining feature. When relaxed, the crest lies flat, but when alarmed, excited, or displaying, it is raised prominently. The large size and all-white body with yellow underwings are also key identifiers.

6. 6

   Juvenile appearance

   How young birds differ from adults.

   Juveniles resemble adults but may have a slightly duller yellow crest and often have darker irises, similar to adult males, making sexing by eye color unreliable until maturity (around 2-3 years). Their calls may also be less developed.

7. 7

   Seasonal changes

   Plumage variation between breeding and non-breeding seasons.

   No significant seasonal plumage changes. Plumage remains consistent year-round.

8. 8

   Sexual dimorphism

   How males and females differ.

   Subtle sexual dimorphism exists primarily in eye color: males typically have dark brown/black irises, and females have reddish-brown irises. This difference is not always easy to discern in the field, especially in poor light or at a distance. Males may also be slightly larger on average, but this is not a reliable field mark.

Key field marks

• Size and Overall Color. Look for a large, entirely white parrot. Its substantial size (45-55 cm) makes it stand out among most other white cockatoos.
• Crest. The most definitive feature is the prominent, forward-curving, sulphur-yellow crest. Observe if it is raised (indicating excitement, alarm, or display) or laid flat.
• Underwing/Undertail Color. In flight, look for the distinct pale yellow wash on the underside of the wings and tail feathers. This is a key differentiator from other white cockatoos.
• Vocalizations. Listen for its extremely loud, harsh, screeching 'kaa-ark' calls. These are unmistakable and often heard before the bird is seen.
• Eye Color (for sexing). If close enough, observe eye color: dark brown/black for males, reddish-brown for females. This is a subtle but reliable indicator in adults.

Explore the Sulphur-crested Cockatoo