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Maui Alauahio Paroreomyza montana
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Justification
This species is classified as Endangered because it has a very small range in which habitat is now being degraded through fire and grazing by feral goats, with the imminent threat of a new pressure posed by feral deer. It remains at risk from habitat degradation, disease and, in some areas, predation by introduced mammals.

Taxonomic source(s)
AOU. 1998. Check-list of North American birds. American Ornithologists' Union, Washington, D.C.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.

Identification
11 cm. Small, straight-billed, warbler-like passerine. Male bright golden-yellow on face and underparts, olive-green on crown and upperparts. May show tiny fleck of black in lores. Bill dark above, pinkish-yellow below. Female similar in pattern but all colours muted, juvenile duller still. Similar spp. Hawai`i `Amakihi Hemignathus virens not as yellow (male) and has curved bill, more black in lores. Introduced Japanese White-eye Zosterops japonicus smaller, greenish above and adults have prominent white eye-ring. Japanese Bush-warbler Cettia diphone grey-brown overall with pale underparts and never have yellow on face. Voice Song a lively whurdy-wheesee-whurdy-chick or a longer warble resembling song of introduced House Finch Carpodacus mexicanus. Call a sharp cheeck or chirk. Hints Forms nucleus of mixed-species flocks on Maui. Most accessible locality for observation is Hosmer Grove in Haleakala National Park.

Distribution and population
Paroreomyza montana is endemic to Maui in the Hawaiian Islands, U.S.A. The nominate subspecies formerly occurred on Lana'i, but it became extinct around 1937. On Maui, it is now found only in two locations in the east, including Waikamoi Preserve to Kipahulu Valley (abundant), and Polipoli State Park and nearby areas south-west of Haleakala peak (Baker and Baker 2000) (no longer common, but exact status unsure [H. Mounce in litt. 2007]). Population densities decline below 1,600 m elevation: in 1980, surveys recorded none below 900 m (Scott et al. 1986) and, in 1997, there was an almost total absence below 1,480 m, with only 40 km2 of occupied good quality habitat above 1,525 m (Baker and Baker 2000). In 1980, the early 1990s and 1997, the total population was estimated at c.35,000 birds (Scott et al. 1986, Jacobi and Atkinson 1995, Baker and Baker 2000) (but <8,550 breeding pairs), suggesting overall stability, although the range has contracted in this time (Baker and Baker 2000). In 2002, it was reported that koa forest in South Haleakala was being degraded by feral goats, prompting suspicions of a population decline (S. Fretz, R. Camp, E. Vanderwerf, M. Gorresen and B. Woodworth in litt. 2003), and in 2007, a fire in PoliPoli State Park destroyed an area of the species's habitat and probably a proportion of the population (H. Mounce in litt. 2007). Surveys after the fire found some surviving birds, but the lack of baseline surveys before the fire has prevented an analysis of the impact on the population (H. Mounce in litt. 2007).

Population justification
In 1980, the early 1990s and 1997, the total population was estimated at c.35,000 birds, including fewer than 8,550 breeding pairs, therefore giving a maximum estimate of 17,100 mature individuals. However, following a fire at PoliPoli State Park (H. Mounce in litt. 2007), the population may have declined further. The estimate is here placed in the band 10,000-19,999 mature individuals. This equates to 15,000-29,999 individuals in total, rounded here to 15,000-30,000 individuals.

Trend justification
The population is suspected to have declined over the past ten years owing to the degradation of koa forest in South Haleakala by feral goats (S. Fretz, R. Camp, E. Vanderwerf, M. Gorresen and B. Woodworth in litt. 2003) and a fire in PoliPoli State Park in 2007, which is thought to have impacted the local population (H. Mounce in litt. 2007). The overall rate of decline has not been estimated.

Ecology
It inhabits dense, wet forests dominated by `ohi`a trees, but occurs in a variety of other forest, scrub and savanna habitats dominated either by native or introduced plants. It feeds on invertebrates and nectar (Scott et al. 1986, Pratt et al. 1987). It lives in small family groups of 2-6 birds (Baker and Baker 2000).

Threats
Clearance of lowland forest has inevitably resulted in range contraction, but its absence from suitable habitat at lower elevations is attributed to the presence of disease-carrying mosquitoes. Feral ungulates, especially pigs, have also caused extensive habitat loss and degradation (Scott et al. 1986, Loope and Medeiros 1995, USFWS and Hawai`i DLNR 1999) and mosquitoes have followed the spread of feral pigs into upland areas (Loope and Medeiros 1995). Habitat response models indicate that this species is associated with forest interiors that are less damaged by feral pigs (Scott et al. 1986). A number of introduced mammals, birds and insects are potential predators and competitors. Koa forest in South Haleakala is now being degraded by feral goats, with deer being a further imminent threat (S. Fretz, R. Camp, E. Vanderwerf, M. Gorresen and B. Woodworth in litt. 2003). A fire at PoliPoli State Park in 2007 is thought to have impacted the local population (H. Mounce in litt. 2007).

Conservation Actions Underway
The core areas where this species reaches its highest population densities are within three protected areas: Waikamoi Preserve, Hanawi Natural Area Reserve and Haleakala National Park, where fencing and control of feral ungulates is already resulting in the slow regeneration of native `ohi`a forests (Loope and Medeiros 1995, Lepson and Freed 1997, Simon et al. 1997, USFWS and Hawai`i DLNR 1999). Habitat restoration in PoliPoli State Park is proposed to include 65% native tree species and is expected to benefit the species (H. Mounce in litt. 2007). Conservation Actions Proposed
Conduct further research into the effect of diseases (Baker and Baker 2000). Study its population dynamics and demography (Baker and Baker 2000). Protect habitat from feral ungulates and rodents (Baker and Baker 2000). Extend plant control to areas outside the three wildlife protection areas (Loope and Medeiros 1995). Encourage the regeneration of native high-elevation forests (Baker and Baker 2000). When possible, translocate the species to establish several widely distributed populations (Baker and Baker 2000), including on the leeward side of east Maui or mountains in west Maui (H. Mounce in litt. 2007). Routinely monitor the East Maui watershed conservation programme (P. Baker in litt. 1999).

References
Baker, H.; Baker, P. E. 2000. Maui 'Alauahio Paroreomyza montana. In: Poole, A.; Gill, F. (ed.), The birds of North America, No. 504, pp. 1-28. The Academy of Natural Sciences, Philadelphia and the American Ornithologists' Union, Philadelphia and Washington, DC.

Jacobi, J. D.; Atkinson, C. T. 1995. Hawaii's endemic birds. In: LaRoe, E.T. (ed.), Our living resources: a report to the nation on the distribution, abundance, and health of US plants, animals, and ecosystems, pp. 376-381. U.S. Department of the Interior, National Biological Service, Washington, D.C.

Lepson, J. K.; Freed, L. A. 1997. 'Akepa (Loxops coccineus). In: Poole, A.; Gill, F. (ed.), The birds of North America, No. 294, pp. 1-24. The Academy of Natural Sciences and The American Ornithologists' Union, Philadelphia and Washington, DC.

Loope, L. L.; Medeiros, A. C. 1995. Strategies for long-term protection of biological diversity in rainforests of Haleakala National Park and East Maui, Hawaii. Endangered Species Update 12: 1-5.

Pratt, H. D.; Bruner, P. L.; Berrett, D. G. 1987. A field guide to the birds of Hawaii and the tropical Pacific. Princeton University Press, Princeton.

Scott, J. M.; Mountainspring, S.; Ramsey, F. L.; Kepler, C. B. 1986. Forest bird communties of the Hawaiian Islands: their dynamics, ecology, and conservation. Cooper Ornithological Society, California.

Simon, J. C.; Baker, P. E.; Baker, H. 1997. Maui Parrotbill (Pseudonestor xanthophrys). In: Poole, A.; Gill, F. (ed.), The birds of North America, No. 311, pp. 1-16. The Academy of Natural Sciences and The American Ornithologists' Union, Philadelphia and Washington, DC.

USFWS and Hawaii DLNR. 1999. US Fish and Wildlife Service and Hawai'i DLNR, Honolulu, USA.

Further web sources of information
Alliance for Zero Extinction (AZE) species/site profile. This species has been identified as an AZE trigger due to its IUCN Red List status and limited range.

Audubon WatchList

Click here for more information about the Alliance for Zero Extinction (AZE)

Explore HBW Alive for further information on this species

Search for photos and videos, and hear sounds of this species from the Internet Bird Collection

Text account compilers
Benstead, P., Capper, D., Khwaja, N., Stattersfield, A., Stuart, T., Taylor, J., Derhé, M.

Contributors
Baker, P., Camp, R., Fretz, S., Gorresen, M., Mounce, H., VanderWerf, E., Woodworth, B.

IUCN Red List evaluators
Butchart, S., Symes, A.

Recommended citation
BirdLife International (2014) Species factsheet: Paroreomyza montana. Downloaded from http://www.birdlife.org on 28/12/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 28/12/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Additional resources for this species

ARKive species - Maui alauahio (Paroreomyza montana) 0

Key facts
Current IUCN Red List category Endangered
Family Fringillidae (Finches and Hawaiian honeycreepers)
Species name author (Wilson, 1890)
Population size 10000-19999 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 260 km2
Country endemic? Yes
Links to further information
- Additional Information on this species