|Scientific Name:||Zosterops hypolais|
|Species Authority:||Hartlaub & Finsch, 1872|
|Red List Category & Criteria:||Near Threatened ver 3.1|
|Reviewer(s):||Butchart, S. & Symes, A.|
|Facilitator/Compiler(s):||Derhé, M., Mahood, S., O'Brien, A., Shutes, S.|
This species has an extremely small range on one small group of islands where it is currently common. The range is not yet severely fragmented or restricted to few locations. For these reasons, the species is classified as Near Threatened. However, it could decline rapidly if alien predators such as brown tree snake Boiga irregularis were introduced, and would then warrant uplisting to a higher threat category.
|Previously published Red List assessments:||
|Range Description:||Zosterops hypolais is endemic to the four islands of Yap, Federated States of Micronesia, where it is common, and, in 1984, was estimated to have a population of 86,864 individuals (Engbring et al. 1990).|
Native:Micronesia, Federated States of
|Continuing decline in area of occupancy (AOO):||Unknown|
|Extreme fluctuations in area of occupancy (AOO):||No|
|Estimated extent of occurrence (EOO) - km2:||100|
|Continuing decline in extent of occurrence (EOO):||Unknown|
|Extreme fluctuations in extent of occurrence (EOO):||No|
|Continuing decline in number of locations:||Unknown|
|Extreme fluctuations in the number of locations:||No|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Engbring et al. (1990) estimated the population to number 86,864 individuals, which is rounded to 86,900 individuals here.
Trend Justification: There are no data on trends; however, the species is thought to be common and tolerates a wide range of habitats, therefore the population is currently thought to be stable.
|Current Population Trend:||Stable|
|Habitat and Ecology:||It is found in nearly all forest and vegetation types, including brushy thickets in open savannas and meadows.|
|Continuing decline in area, extent and/or quality of habitat:||Unknown|
|Generation Length (years):||3.5|
|Movement patterns:||Not a Migrant|
|Major Threat(s):||It appears to be in no particular danger but, given its small range, it will always be at some risk from stochastic events, including exotic introductions such as the 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
Periodically monitor populations to establish trends. Take measures to ensure B. irregularis never reaches Yap.
|Citation:||BirdLife International. 2012. Zosterops hypolais. The IUCN Red List of Threatened Species 2012: e.T22714053A39628917. http://dx.doi.org/10.2305/IUCN.UK.2012-1.RLTS.T22714053A39628917.en . Downloaded on 04 October 2015.|
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