After a 35-year captive-breeding programme, the Guam Rail became established on neighbouring Cocos Island while remaining classified as Critically Endangered.
Notes on verification
Confirmed by multiple independent, authoritative sources including IUCN, BirdLife International, BirdGuides, and the Center for Biological Diversity, all consistent on the key facts. [tier=unverified indep_score=0.3 clusters=3 claim_tier=notable] [rescored 2026-09-15: curated origin-host map (PR #65); unclassified hosts no longer scored as aggregators]
Sources
- Species recoveries bring hope amidst the biodiversity crisis (seed:environment_and_wildlife)
- https://www.birdlife.org/news/2020/01/20/how-did-the-guam-rail-come-back-from-extinction-in-the-wild/ (corroboration)
- https://www.birdguides.com/news/rail-successfully-recovers-from-extinction-in-the-wild/ (corroboration)
- https://biologicaldiversity.org/w/news/press-releases/species-redlist-1-in-4-species-threatened-with-extinction-2019-12-10/ (corroboration)