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Hong Kong scientist puts hope in nest boxes to save endangered cockatoos

Nest boxes mimic natural hollows to boost breeding and juvenile survival of yellow-crested cockatoos, which number only 1,200 to 2,000 globally, researchers say.

  • Fewer than 2,000 endangered yellow-crested cockatoos remain in the world, with about one-tenth found in Hong Kong, one of the "largest cohesive remaining wild populations" globally.
  • The cockatoos' numbers have stagnated due to habitat loss from typhoon damage and government pruning, with far fewer juveniles than when monitoring began almost ten years ago.
  • A "black market" for the rare birds may exist, with a one-year-old bird being sold for HK$56,000 and a two-month-old chick for HK$14,000 , despite trading wild-caught yellow-crested cockatoos being illegal since 2005.
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HK scientist puts hope in nest boxes to save endangered cockatoos

Above the teeming shopping streets of Hong Kong's Causeway Bay district, a fight to save one of the world's most endangered species is unfolding high in the branches of a decades-old cotton tree.

·United Kingdom
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Phys.org broke the news in United Kingdom on Tuesday, August 19, 2025.
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