Maui ʻalauahio

The Maui alauahio (Paroreomyza montana), also known as the Maui Nui alauahio or Maui creeper, is a species of Hawaiian honeycreeper. It is endemic to Maui Nui, Hawaii. The name Maui alauahio is somewhat misleading because the species seems to have occurred on most, if not all, parts of the ancient Maui Nui, which includes the present day islands of Maui, Molokaʻi, Lānaʻi, and Kahoʻolawe. There are two subspecies: the Lānaʻi ʻalauahio, P. montana montana, which occurred on Lānaʻi (extinct); and P. montana newtoni which occurs on Maui. The common name refers to both groups.

Description
The Maui ʻalauahio is similar to the Hawaiʻi ʻamakihi in appearance and behavior. However, Maui ʻalauahio are a brighter yellow color, have a less curved bill and do not have prominent black lores (area between the bill and the eye).

Song
The Maui ʻalauahio call is a loud "cheep", and their song consists of a repeated whistled phrase "whichy-wheesee-whurdy-whew".

Diet
Maui ʻalauahio are insectivorous and forage along trunks and branches flipping over lichen and bark in search of insects. They eat moths, beetles, spiders, leafhoppers, lacewings, and ichneumonid wasps. They forage on native plants including ʻōhiʻa, koa, pilo, alani, ʻōhelo, kōlea, pūkiawe, and ʻōlapa.

Breeding
The breeding season for Maui ʻalauahio is March - August. They are monogamous and often are assisted by the non-breeding second year offspring at the nest. The nest helpers assist the male with feeding the female during incubation, as well as feeding the chicks, usually by regurgitation. Maui ʻalauahio young may stay with parents for up to 20 months, and then breed in their third year. Interestingly, there are fewer Maui ʻalauahio pairs documented with nest helpers in disturbed habitats (20-30%) than native plant habitat (96%).

Habitat and distribution
Currently, Maui ʻalauahio are restricted to three populations above 900 m (2,952 feet) elevation on east Maui. These populations occur in three diverse habitats that are in the range of conservation managed areas, including the rainforest belt of Halealakā National Park, a forestry plantation, and a relic dry forest. Maui ʻalauahio can be seen at Hosmer's Grove at Haleakalā National Park and Polipoli Springs State Recreation Area.

Conservation
The Maui ʻalauahioʻs range is restricted and threatened by habitat loss. Many factors contribute towards its habitat loss, including degradation from feral ungulates, and the introduction of invasive plants, like strawberry guava, that impact habitat diversity and quality. The species is also limited to higher elevations due to its high susceptibility to avian malaria, with a 75% mortality rate after exposure to an infected mosquito bite.