Poo-uli
One of Hawaii's rarest birds — last seen in the wild in 2004, in a story of missed chances
No photo available for Poo-uli
Population
Three individuals known in 1997; last confirmed individual died in captivity in 2004
Location
Maui, Hawaii, USA
Overview
The poo-uli was a small, striking honeycreeper discovered on the slopes of Haleakalā on Maui in 1973 — unknown to science until that year despite Hawaii's long history of ornithological study. By 1997, only three individuals were known. Attempts to encourage them to find each other in the wild failed. The last known individual was captured in September 2004, brought into captivity for an emergency breeding attempt, and died three months later. No other individual has been confirmed since. Its extinction marked the end of an entire genus.
Why they're at risk
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Avian malaria, spread by introduced mosquitoes, is lethal to native Hawaiian honeycreepers that evolved with no resistance to it. The poo-uli's habitat at high elevation was a refuge — warming temperatures are pushing mosquitoes higher.
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Introduced rats and mongooses predated nests and eggs throughout the Hawaiian forests.
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Habitat loss from feral pigs, which destroy the native understory the poo-uli depended on for its diet of tree snails.
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The three known individuals lived in separate home ranges and showed no natural tendency to find each other — even with humans attempting to facilitate contact, they never successfully bred.
Reasons for hope
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Frozen tissue samples from the last individual are preserved at the San Diego Frozen Zoo — the most comprehensive repository of genetic material from endangered species. Theoretical de-extinction pathways exist, though none are near practical implementation.
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The story of the poo-uli has directly strengthened political will for aggressive mosquito control programs in Hawaiian forests — including sterile insect technique programs now protecting other critically endangered honeycreepers.
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Several other Hawaiian honeycreepers that faced similar trajectories have been stabilized through intensive management, showing that the lessons from the poo-uli's loss are being applied.
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A managed mosquito abatement program using incompatible insect technique on Maui is now protecting high-elevation habitat from the avian malaria that contributed to the poo-uli's extinction.