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Tahiti Monarch Pomarea nigra
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BirdLife Species Guardian Société d'Ornithologie de Polynésie (MANU)
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Justification
Although intensive conservation action has now reversed declines and resulted in a substantial population increase, the population size remains tiny, and the species therefore qualifies as Critically Endangered.

Taxonomic source(s)
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.

Identification
15 cm. Monochrome flycatcher. Adults entirely black with pale blue bill. Immatures rufous-cinnamon, paler below. Voice Call a sharp tick-tick-tick. Song a complex, flute-like melody.

Distribution and population
Pomarea nigra is endemic to Tahiti in the Society Islands, French Polynesia. It was apparently rare throughout the 20th century and, during the period 1986-1991, was noted in only four valleys (several pairs at each locality) out of 39 visited (Monnet et al. 1993). In September 1998, 27 birds (12 pairs) were located within these four lowland valleys. This figure has remained stable or perhaps increased slightly and in 2006 there were 12 territories occupied by 19 adult or subadult birds in accessible parts of the valleys, with new pairs even becoming established in abandoned territories, and the total population estimated at 40-45 individuals (P. Raust in litt. 2005, Gouni et al. 2007). The known population of mature birds numbered 35 individuals in 2010 (Anon 2010, Gouni et al. 2011), and 40 individuals (including 7 fledglings) in 2011 (Ghestemme et al. 2011). In 2012 there were 43-44 individuals including 38 territorial birds (25 in 2011), 25 territories (18 in 2011) and 12 pairs fledged nine young, a record since recovery began (Blanvillain 2012, Anon. 2013).


Population justification
The known population in 2012 was 43-44 individuals (Blanvillain 2012), and the population is best placed the band <50 mature individuals.

Trend justification
Since 2004, the species has shown signs of recovery, with new pairs becoming established in abandoned territories and recruitment of young birds in 2008 (Ghestemme in litt. 2012). The total population has increased slightly to 19 known individuals (40-45 estimated individuals) in 2006 (Gouni et al. 2007) and a known population of 40 individuals in 2011 (Ghestemme et al. 2011) and 43-44 in 2012 (Blanvillain 2012).


Ecology
It is only found between 80 m and 400 m in altitude, and the tree "mara" Neonauclea forsteri is a common feature of the four valleys where it survives (Thibault et al. 1999). Nesting sites are often situated at the bottom of valleys, close to permanent or temporary streams, with habitat dominated by alien plant species (Portier 2010). It is highly territorial, foraging both in the canopy and the undergrowth for insects (Pratt et al. 1987).

Threats
Its decline on Mt Mara`u might be related to the replacement of the high, dense forest by shrubs of the botanical pest Miconia calvescens, introduced in 1937, whose progression was partly facilitated by a hurricane in 1983 (J.-C. Thibault in litt. 1993). A decline in habitat quality is a likely threat elsewhere, as forest is largely composed of introduced invasive species, such as the African tulip tree Spathodea campanulata, and usually confined to a narrow strip along the floor of steep basalt canyons (Gaze 1998). Predation by rats, particularly Black Rat Rattus rattus, is probably the main threat (Blanvillain 2000, Thibault et al. 2002), and goat grazing is leading to habitat degradation in some areas (Ghestemme 2009). A three-year study showed that significantly more Red-vented Bulbul Pycnonotus cafer and Common Myna Acridotheres tristis were present in territories that experienced nest failure or early fledgling death (Blanvillain et al. 2002), while other potential predators include cats and Swamp Harrier Circus approximans (Ghestemme 2009). Common Myna has been implicated in the predation of eggs, and chicks while in the nest and probably following fledging. Red-vented Bulbul has been implicated in reducing chick survival by disrupting the reproduction of paired Monarchs, and competing for food and territories. Unnatural nest failures during 2008-2010 were related to mynas, although bulbuls are apparently responsible of the unique failure of 2011 (Ghestemme 2011, T. Ghestemme in litt. 2012). Tahiti Kingfisher Todiramphus veneratus is an aggressive competitor which has been observed driving several monarchs off their territory (Ghestemme 2009) and preventing colonisation of suitable sites by young monarchs (Ghestemme 2011).

Conservation Actions Underway
In 1998, rat control around known nests (using poisoning and tree-banding) was initiated by the Société d'Ornithologie de Polynésie MANU (Blanvillain 2000). Rat control was more successful when conducted throughout the year and over the entire valley (Gouni 2006). However, when control was confined to monarch territories only, re-invasions occurred on a regular basis (Blanvillain et al. 2002). The number of areas controlled for rats has increased since 2008 and improvements are on going (Ghestemme 2011). Rat control in Maruapo upper valley has improved  in recent years with 28 bait stations set in 2011 (T. Ghestemme in litt. 2012). Some control of invasive Miconia and Spathodea is ongoing in accessible valleys (Raust 2010). In 2009-2011, 13 Tahiti Kingfishers were captured in the Papehue valley and moved to areas away from monarch populations with the aim of reducing competition. Following removal of the kingfishers, new colonisation of these areas by young monarchs was observed (T. Ghestemme in litt. 2012). An immature Tahiti Monarch found at a degraded site was translocated to a valley with suitable habitat and a low existing population (Ghestemme 2011). An action plan has also been produced (Thibault et al. 1999), and the feasibility of translocation is being assessed: a recent feasibility study found that it would be possible to introduce the species to the island of Rimatara, based on the absence of Black Rat, Common Myna, Red-vented Bulbul and Swamp Harrier, and the availability of suitable nesting habitat (Portier 2010). Introduction of the first young birds to Rimatara was planned for 2013 (T. Ghestemme in litt. 2012). A recovery group, shared with Fatuhiva Monarch P. whitneyi, has been established to formulate a conservation strategy (T. Ghestemme in litt. 2010), and plans are underway to implement a site support group created in 2010. Between 2009 and 2011, 21 individuals have been colour-banded. A trapping campain resulted in the removal of 2,700 Common Myna and Red-vented Bulbul by 2012, and the same year there was no recorded predation by mynas (1-3 nest failures per year previously; Anon. 2013).
Conservation Actions Proposed
Regularly monitor known territories in the four valleys, including searching for nests, searching for birds in previously known locations and surveying possible new areas (Thibault et al. 1999). Continue rat control using a combination of poisoning and tree-banding (SPREP 1999, Thibault et al. 1999, Blanvillain 2000). Conduct experiments to improve the quality of the habitat in a couple of valleys by encouraging the growth of young mara trees and removing African tulip trees (Thibault et al. 1999). Confirm the impact of introduced birds and investigate their control (SPREP 1999, Thibault et al. 1999, Blanvillain 2000). If essential, take surviving birds into captivity, increase this population through captive breeding and release once a suitable site/island has been identified/restored (Thibault et al. 1999, Blanvillain 2000). Animate the Monarch Recovery Group by submitting the synthesis on different aspects of Tahiti monarch conservation including the translocation procedure. Develop the Operational Plan for the introduction of Monarch to Rimatara island. Locate and survey more intensively birds selected for being transferred on Rimatara

Related state of the world's birds case studies

References
Anon. 2013. Monarque de Tahiti: une annã©e record! L"oiseau 110: 33.

Blanvillain, C. 2000. Programme de sauvegarde du monarque de Tahiti: des premiers résultats prometteurs pour la survie de l'espèce. Bulletin de la Société d'Ornithologie de Polynésie (Te Manu) 30: 3-4.

Blanvillain, C. 2012. Monarque de Tahiti: bilan provisoire de la saison de reproduction. Te Manu 80: 8-9.

Blanvillain, C.; Florent, C.; Thenot, V. 2002. Land birds of Tuamotu Archipelago, Polynesia: relative abundance and changes during the 20th century with particular reference to the critically endangered Polynesian Ground-dove (Gallicolumba erythroptera). Biological Conservation 103: 139-149.

Blanvillain, C.; Tamaititahio, M.; Noguera, C.; Marion, J. 2001. Rat and introduced bird control to save the critically endangered Tahiti Flycatcher (Pomarea nigra) from extinction: report on the TFC reproductive success for the 2001 breeding season (Part 1: from 1 July to 31 December 2001; English report).

Gaze, P. 1998. Tahiti Monarch Flycatcher. Ornithological Society of New Zealand News: 1.

Ghestemme T. 2011. Impacts of introduced birds on the last population of the Tahiti Monarch. Pacific Invasive Initiative newsletter.

Ghestemme, T. 2009. Le Monarque de Tahiti rajeunit mais les martins-chasseurs l'empêchent de s'établir. Te Manu: 3-4.

Gouni A., Zyman T. 2011. OIseaux du Fenua, Tahiti et ses îles. 2nd edition. Téthys Editions, Taravao.

Gouni, A. 2006. Bilan mitigé pour le programme de sauvegarde du Monarque de Fatu Hiva en 2006. Te Manu: 5-6.

Gouni, A.; Durieux, J.; Piquemal, D.; Albar, G.; Blanc, L.; Gfeller, H.; Levy, P.; Lau, N. 2007. Programme de conservation de la Gallicolombe erythroptère, Gallicolumba erythroptera.

Monnet, C.; Thibault, J.; Varney, A. 1993. Stability and changes during the twentieth century in the breeding landbirds of Tahiti (Polynesia). Bird Conservation International 3: 261-280.

Portier, E. 2010. Introduction du Monarche de Tahiti aux Australes? Te Manu: 3-5.

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.

Raust, P. 2010. Le Monarque de Tahiti de la vallée Maruapo. Te Manu: 3-4.

SPREP. 1999. Proceedings of the Polynesian Avifauna Conservation Workshop held in Rarotonga, 26-30 April 1999.

Thibault, J. C.; Martin, J. L.; Penloup, A.; Meyer, J. Y. 2002. Understanding the decline and extinction of monarchs (Aves) in Polynesian Islands. Biological Conservation 108: 161-174.

Thibault, J.-C.; Blanvillain, C.; Monnet, C. 1999. Plan de conservation du 'Omama'o (monarque de Tahiti Pomarea nigra): étude des mécanismes d'extinction.

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.

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

Species Guardian Action Update

Text account compilers
Bird, J., Calvert, R., Derhé, M., O'Brien, A., Pilgrim, J., Shutes, S., Stattersfield, A. & Symes, A.

Contributors
Ghestemme, T., Gouni, A., Millett, J., Raust, P. & Thibault, J.

Recommended citation
BirdLife International (2014) Species factsheet: Pomarea nigra. Downloaded from http://www.birdlife.org on 18/09/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 18/09/2014.

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 - Tahiti monarch (Pomarea nigra) 0

Key facts
Current IUCN Red List category Critically Endangered
Family Monarchidae (Monarchs)
Species name author (Sparrman, 1786)
Population size 1-49 mature individuals
Population trend Increasing
Distribution size (breeding/resident) 28 km2
Country endemic? Yes
Links to further information
- Additional Information on this species