Current view: Text account
Site description (2007 baseline):
Site location and context
The proposed Alamagan Island IBA is one of only two islands with extant populations of Nightingale Reed Warblers. The interior of the island has steep slopes cut by steep ravines; other areas are grassland or bare lava flows.
The entire island of Alamagan (Figure 18) is proposed as an IBA under A1 and A2 criteria, specifically for its population of Nightingale Reed Warblers. The island is also home to Micronesian Megapodes, White-throated Ground-Doves, Collared Kingfishers, Micronesian Starlings, and Micronesian Honeyeaters. Currently, populations of Nightingale Reed Warblers are found only on Saipan and Alamagan (DFW, 2007a), with approximately 100 pairs residing on Alamagan. Although Micronesian Megapodes and Nightingale Reed-Warblers prefer to use forested areas, the entire island is proposed as an IBA due to its small size.
Pressure/threats to key biodiversity
The island is inhabited and development poses a threat. Rats are a threat.
There are no protected areas at present.
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Alamagan Island (Northern Mariana Islands (to USA)). Downloaded from
https://datazone.birdlife.org/site/factsheet/alamagan-island-iba-northern-mariana-islands-(to-usa) on 23/11/2024.
