https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.102819/Moho_bishopi

https://en.wikipedia.org/wiki/Bishop%27s_%CA%BB%C5%8D%CA%BB%C5%8D

It was seen in 1904 by ornithologist George Campbell Munro. In 1915, Munro tried to verify reports of eventual sightings but he never found live individuals again. The last sighting was by Dr. Stephen Sabo in 1981.
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Reports of an O'o on Maui have been catalogued since 1828.[4] In 1902, Henshaw reported seeing a bird matching the appearance of Bishop's O'o in the Olinda region. A spat of sightings of a bird with field marks and calls matching Bishop's O'o was reported in the 1980's from the Ko'olau Nature Reserve, most notably by Stephen R. Sabo in 1981.[5] Subfossil remains of an O'o are known from Maui, so it is not implausible Bishop's O'o may have occurred here and evaded detection due to Maui being overlooked by 19th and 20th century collectors.[6]