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Yap Monarch Monarcha godeffroyi
BirdLife is updating this factsheet for the 2016 Red List
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This species is listed as Near Threatened because it has a moderately small range, being restricted to four very small islands. The population is currently considered stable as it is tolerant of habitat degradation; however, the accidental introduction of predators such as black rat Rattus rattus or brown tree-snake Boiga irregularis would cause the species to be uplisted.

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

Distribution and population
Monarcha godeffroyi is endemic to the islands of Yap, Federated States of Micronesia, occurring on Yap, Gagil-Tomil, Rumung (presumably) and Maap, where it is widespread. In 1984, it was estimated to number 26,961 individuals (Engbring et al. 1990).

Population justification
Engbring et al. (1990) published a population estimate of at least 27,000 mature individuals, roughly equating to at least 40,000 individuals.

Trend justification
There are no data on population trends; however, since the species can tolerate degraded habitat the population is assumed to be stable.

It inhabits virtually all forest types including mangroves and secondary growth (Engbring et al. 1990).

It is unlikely to be affected by habitat degradation as it is able to ultilise the scrubby vegetation which often invades forest-cleared sites. However, given its small range, it is at risk from the accidental introduction of alien species, especially brown tree snake Boiga irregularis which has caused the extirpation and extinction of birds on Guam (to USA) (Engbring et al. 1990).

Conservation Actions Underway
None is known

Conservation Actions Proposed
Monitor population to determine trends. Ensure B. irregularis does not become established on any of the Yap islands.

Engbring, J.; Ramsey, F. L.; Wildman, V. J. 1990. Micronesian forest bird surveys, the Federated States: Pohnpei, Kosrae, Chuuk, and Yap. U.S. Fish and Wildlife Service, Honolulu.

Further web sources of information
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
Derhé, M., Mahood, S., O'Brien, A., Shutes, S.

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

Recommended citation
BirdLife International (2016) Species factsheet: Monarcha godeffroyi. Downloaded from on 24/10/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from on 24/10/2016.

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.

Key facts
Current IUCN Red List category Near Threatened
Family Monarchidae (Monarchs)
Species name author Hartlaub, 1868
Population size 27000 mature individuals
Population trend Stable
Distribution size (breeding/resident) 100 km2
Country endemic? Yes
Links to further information
- Additional Information on this species