Cook Islet Bird Sanctuary
An islet in the Kiritimati lagoon with dense seabird nesting, landing restricted.
Updated 3 September 2026
Cook Islet sits in the lagoon on Kiritimati and is one of the closed areas set aside for seabirds, with sooty terns, noddies, boobies and frigatebirds nesting in density on a small patch of ground. Kiritimati holds one of the largest seabird populations of any island in the Pacific. Landing is restricted to protect the nesting and boats generally circle rather than go ashore. Kiritimati has several closed islets in its lagoon, set aside at different times as sanctuaries.
What's there
- The nesting density - seabirds packed onto a small area of ground.
- The species mix - terns, noddies, boobies and frigatebirds together.
- The lagoon setting - an islet within the enclosed water.
- The protection - a closed area with landing controlled.
When to go
Seabirds nest through much of the year. April to October is the drier season generally. El Niño events reduce numbers sharply.
What to expect
Landing is restricted and most visits are from the boat. Permits are required. El Niño events have caused major seabird die-offs on the island.
Nearby
The bonefish flats are around it, and the settlement is west.
What to pack for Cook Islet Bird Sanctuary
Chosen from what this place is for. Tap a kit for the full checklist.
- Broken-in walking shoes or boots - Grip and ankle support matter more than looks; never hike in brand-new boots. Find on Amazon
- Reef-safe sunscreen - High SPF that will not bleach the coral you are swimming over. Find on Amazon
- Layers + a waterproof shell - Mountain weather turns fast; a packable rain jacket saves the day. Find on Amazon
- Quick-dry towel - A microfibre towel packs small and dries in minutes. Find on Amazon
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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.
