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.
- 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.
- 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.
- 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.
