Yellow-Crested Cockatoos

Source: TH

Context: Critically endangered yellow-crested cockatoos in Hong Kong are losing natural nesting sites due to tree loss and urban trimming, prompting conservationists to install artificial nest boxes to support their survival.

About Yellow-Crested Cockatoos:

What They Are?

• Medium-sized white cockatoos with a striking yellow crest, known for loud calls and social behaviour.

Scientific name: Cacatua sulphurea.

Native Range:

• Endemic to Indonesia and Timor-Leste – once common in Nusa Tenggara, Sulawesi, Masalembu Islands.

• Currently survives in small populations on Komodo, Flores, Sumbawa, Timor and a few Sulawesi islands.

Habitat:

• Prefer tropical dry forests, woodlands, and tree cavities for nesting.

• In cities, adapt to urban parks and tall tree canopies, coexisting with human activity.

IUCN Status: Critically Endangered on the IUCN Red List.

Features:

• Physical:

• Medium-sized bird with snow-white plumage and a bright yellow crest that fans up when excited or alarmed. Has a strong, curved black beak adapted for cracking nuts and seeds; noticeably smaller than the sulphur-crested cockatoo.

• Medium-sized bird with snow-white plumage and a bright yellow crest that fans up when excited or alarmed.

• Has a strong, curved black beak adapted for cracking nuts and seeds; noticeably smaller than the sulphur-crested cockatoo.

• Social Behaviour:

• Highly gregarious and vocal, often seen flying in noisy flocks, communicating through loud squawks. Exhibit strong pair-bonding, forming lifelong monogamous pairs and showing cooperative behaviour within groups.

• Highly gregarious and vocal, often seen flying in noisy flocks, communicating through loud squawks.

• Exhibit strong pair-bonding, forming lifelong monogamous pairs and showing cooperative behaviour within groups.

• Biological Traits:

• Nest in natural tree hollows or cavities, laying 2–3 eggs per clutch during breeding season. Both male and female share incubation duties and jointly feed the chicks until fledging, ensuring high parental investment.

• Nest in natural tree hollows or cavities, laying 2–3 eggs per clutch during breeding season.

• Both male and female share incubation duties and jointly feed the chicks until fledging, ensuring high parental investment.

• Migration & Movement:

• Mostly sedentary species, staying within established home ranges throughout the year. May undertake local movements to find food, water, or safe nesting sites, especially when habitat is disturbed.

• Mostly sedentary species, staying within established home ranges throughout the year.

• May undertake local movements to find food, water, or safe nesting sites, especially when habitat is disturbed.