The po'o-uli, or black-faced honeycreeper, is an endemic bird on Maui in Hawai'i, was declared extinct September 29, 2021. The last known two birds were sighted in 2004.
The po'o-uli was discovered in 1973. Its diet consisted of snail, insects and spiders, but invasive species of plants and animals, such as hogs, cats, and rats, contributed to its decline. When they were first discovered, there were only 76 birds per square kilometer. By 1985, the number slipped to only 8 per km2.
Hawai'i established Hanawi Natural Area Reserve to protect endangered flora and fauna, but only 3 birds existed by 1997. US Fish and Wildlife Service declared the po'o-uli extinct, September 29, 2021.
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