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Pomarea iphis 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Passeriformes Monarchidae

Scientific Name: Pomarea iphis Murphy & Mathews, 1928
Common Name(s):
English Iphis Monarch, Ua Huka Flycatcher
Taxonomic Source(s): del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

Assessment Information [top]

Red List Category & Criteria: Vulnerable D2 ver 3.1
Year Published: 2016
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Contributor(s): Raust, P. & Faulquier, L.
Facilitator/Compiler(s): Benstead, P., Derhé, M., Mahood, S., Temple, H.
Justification:
This species qualifies as Vulnerable because it is confined to one tiny island and is at risk from the introduction of alien species, especially black rats.

Previously published Red List assessments:

Geographic Range [top]

Range Description:Pomarea iphis is endemic to the Marquesas Islands, French Polynesia. It is restricted to Ua Huka, where several hundred pairs were estimated in 1975 (Holyoak and Thibault 1984), and 500-1,250 in 1998, at a mean density of 2-5 pairs/ha (Thibault and Meyer 2001).

Countries occurrence:
Native:
French Polynesia
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:100
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Number of Locations:1Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):30
Upper elevation limit (metres):840
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Several hundred pairs were estimated in 1975 by Holyoak and Thibault (1984), and 500-1,250 pairs were estimated in 1998, at a mean density of 2-5 pairs/ha (Thibault and Meyer 2001).



Trend Justification:  There are no known threats and the population is estimated to be stable, based on survey data.
Current Population Trend:Stable
Additional data:
Number of mature individuals:1000-2499Continuing decline of mature individuals:No
Extreme fluctuations:NoPopulation severely fragmented:No
No. of subpopulations:1Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:Yes
No. of individuals in largest subpopulation:100

Habitat and Ecology [top]

Habitat and Ecology:On Ua Huka (c.30% forested), breeding birds were found from 30 m to 650 m (non-breeders to 840 m) in all native low- to mid-elevation moist and wet forest in the south and locally in lowland dry forest (with Pisonia grandis) on the eastern coast (Thibault and Meyer 2001). It forages in dense brush, gleaning insects from branches or hawking them in dark, shaded areas beneath brush-covered canopy (Pratt et al. 1987).

Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):6.9
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s): On Ua Huka, there are no current threats, although Pacific rats Rattus exulans have always been present. In 1998 the Black Rat Rattus rattus was thought to be present (Thibault and Meyer 2000) on an adjacent islet (Teuaua) but was subsequently found to be absent (Faulquier et al. 2008). Habitat degradation by cyclones is a minor cause for concern. Although overgrazing by feral goats and cattle is a problem in some forested areas in the centre of the island, the valley habitat remains in good condition and so overgrazing is not currently thought to be a threat.

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
Intensive trapping campaigns were performed from 2008 to 2011 and indicate that R. rattus is still absent from Ua Huka (Faulquier et al. 2008, Faulquier et al. 2009a,b, Champeau et al. 2010, Champeau et al. 2011).  In 2009, biosecurity measures were implemented on Ua Huka (rat bait-stations were installed on the 3 wharves of the island) in order to prevent the establishment of the Black Rat Rattus rattus and these actions continue to be maintained (Faulquier et al. 2009a,b, Champeau et al. 2010, Champeau et al. 2011).

Conservation Actions Proposed
On Ua Huka, resurvey the population to ascertain any trends. Take precautions to prevent the establishment of R. rattus (including continuing to maintain rat bait-stations). Continue to survey for black rat R. rattus (P. Raust in litt. 1999) and assess any other threats. On Teuaua, attempt to eradicate R. rattus again.


Citation: BirdLife International. 2016. Pomarea iphis. The IUCN Red List of Threatened Species 2016: e.T22734314A95082236. . Downloaded on 23 September 2017.
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