|Location||Northern Mariana Islands (to USA), Guguan Island|
|Central coordinates||145o 50.00' East 17o 19.00' North|
|IBA criteria||A1, A2, A4i, A4iii|
|Altitude||0 - 301m|
|Year of IBA assessment||2012|
Site description The proposed Guguan Island IBA is uninhabited and protected by CNMI law as a Wildlife Conservation Area. The volcanic island is free of large introduced mammals. The coast is bordered by steep basaltic rock with gables of high ridges which contain deep, rain-eroded gorges.
Key Biodiversity The entire island of Guguan is proposed as an IBA under A4i and A4iii criteria. The island qualifies as an IBA under A4i criteria for Grey-backed Terns and Sooty Terns. The island qualifies under A4iii criteria for its total seabird population. Guguan is also home to Micronesian Megapodes, White-throated Ground-Doves, Micronesian Starlings, Collared Kingfishers, and Micronesian Honeyeaters (DFW, 2007b).
Non-bird biodiversity: Additional rare and endangered species on the island include Mariana Fruit Bat.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Micronesian Scrubfowl Megapodius laperouse||resident||-||present||-||A1, A2||Endangered|
|Grey-backed Tern Onychoprion lunatus||breeding||1979-1988||1,200 breeding pairs||medium||A4i||Least Concern|
|Sooty Tern Onychoprion fuscatus||unknown||1979-1988||37,655 individuals||medium||A4i||Least Concern|
|White-throated Ground-dove Alopecoenas xanthonurus||resident||-||present||-||A1, A2||Near Threatened|
|Micronesian Myzomela Myzomela rubratra||resident||-||present||-||A2||Least Concern|
|Micronesian Starling Aplonis opaca||resident||-||present||-||A2||Least Concern|
|A4iii Species group - waterbirds||unknown||1979-1988||40,273 individuals||medium||A4iii|
|2007||high||not assessed||not assessed|
|Geological events||volcanic eruptions||likely in long term (beyond 4 years)||whole area/population (>90%)||very rapid to severe deterioration||high|
|Invasive & other problematic species, genes & diseases||invasive non-native/alien species/diseases - named species||happening now||some of area/population (10-49%)||slow but significant deterioration||medium|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|Guguan Island||Preserve||412||is identical to site||412|
Protection status The island is currently protected under CNMI law as part of the Northern Islands Conservation Area (CNMI DFW, 2007). Guguan had previously been nominated as one of the “Islands for Science” reserves.
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Recommended citation BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Guguan Island. Downloaded from http://www.birdlife.org on 30/08/2016
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