Millenium (Caroline) Island

IBA Criteria

Year of most recent IBA criteria assessment: 2012

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Great Frigatebird Fregata minor LC breeding 1988 2,427 breeding pairs A4ii
Red-footed Booby Sula sula LC breeding 1988 2,221 breeding pairs A4ii
Bristle-thighed Curlew Numenius tahitiensis NT non-breeding 1988-1990 83-300 individuals A1, A4i
Black Noddy Anous minutus LC breeding 1988 8,392 breeding pairs A4i
Common White Tern Gygis alba LC breeding 1988 3,957 breeding pairs A4i
Sooty Tern Onychoprion fuscatus LC breeding 1988-1990 188,200 breeding pairs A4i
A4iii Species group - waterbirds n/a breeding 1988 202,040 breeding pairs A4iii

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Millenium (Caroline) Island. Downloaded from on 28/01/2022.