Hemignathus affinis
The Maui Nukupuu, scientifically known as *Hemignathus affinis*, was a distinctive medium-sized Hawaiian honeycreeper, measuring approximately 14 cm (5.5 inches) in length. Its most remarkable feature was its highly specialized, asymmetrical bill: a short, straight lower mandible coupled with a much longer, strongly decurved upper mandible. Males typically displayed an olive-green back and vibrant yellow underparts, with a contrasting yellow face and supercilium, while females and juveniles w...
This species inhabited montane wet forests dominated by 'ōhi'a (Metrosideros polymorpha) and koa (Acacia koa) trees, typically at elevations between 1,000 and 2,000 meters (3,300-6,600 feet).
Its diet consisted primarily of arthropods (insects and spiders) extracted from bark and wood, supplemented by nectar from native flowers like 'ōhi'a lehua. Foraging was highly specialized, using its unique bill as a probe and chisel.
Maui Nukupuu were primarily diurnal, spending their days foraging actively within the forest canopy and understory. Their unique bill was expertly employed in a specialized foraging technique: the short lower mandible was used to chip away bark and wood, while the long, curved upper mandible prob...
The Maui Nukupuu was strictly endemic to the island of Maui, Hawaii. Historically, its range encompassed the montane wet forests of the island, primarily on the windward slopes of Haleakalā volcano. The species was concentrated in specific areas such as the Hanawi Natural Area Reserve and the adj...
Critically Endangered
- The Maui Nukupuu's bill is one of the most extreme examples of adaptive radiation, with the lower mandible acting as a chisel and the upper as a probe. - Its scientific name, *Hemignathus*, means 'half-jaw' in Greek, perfectly describing its asymmetrical bill. - The last confirmed sighting of a...