Justification of Red List Category
This species is known from Hawaii's Big Island, USA, but it has not been recorded since 1901 and is now Extinct. Most of its habitat was cleared for agriculture, which is likely to have caused the extinction.
Hemignathus sagittirostris was only found along the Wailuku river above Hilo on Hawai`i, USA (Lindsey et al. 1998). It was discovered in 1892 (Greenway 1967), and last recorded in 1901 (Stattersfield et al. 1998).
It was restricted to dense, moist ohi'a forest at 152-1220 m.
This forest was cleared for sugar cane, causing the species's extinction (Amadon 1950).
Text account compilers
Brooks, T., Khwaja, N., Mahood, S., Martin, R
BirdLife International (2019) Species factsheet: Viridonia sagittirostris. Downloaded from http://www.birdlife.org on 24/03/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 24/03/2019.