Saipan White-eye Zosterops saypani

Family: Zosteropidae (White-eyes and Yuhinas)

Authority: Dubois, 1902

Red List Category

Criteria: B1a+2a; D2

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Justification of Red List category
Although confined to just four small islands (one of which it was introduced to), this species remains very common and is not thought to be declining. However, it remains at risk from the accidental introduction of Brown Tree Snake Boiga irregularis from nearby Guam which caused the extinction of Zosterops conspicillatus. If the snakes were introduced to the island of Saipan, which hosts c.70% of the global population of this species, it may decline at a rate that qualifies it for being listed as threatened in a very short space of time. However, given the biosecurity measures on all four islands, a more rapid reduction capable of driving the species to Critically Endangered or extinction is considered very unlikely. It is consequently listed as Near Threatened.

Population size: 410000-630000, 510000

Population trend: Stable

Extent of occurrence (breeding/resident): 3,090 km2

Country endemic: Yes

Recommended citation
BirdLife International (2022) Species factsheet: Zosterops saypani. Downloaded from http://www.birdlife.org on 29/11/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 29/11/2022.