• Hawaiian stilt in water

    Ae‘o / Hawaiian stilt

    Stilts have a loud chirp that sounds like: kip kip kip. They eat invertebrates and other aquatic organisms.

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  • Hawaiian coot with chick

    ‘Alae ke‘oke‘o / Hawaiian coot

    Coots call includes a variety of short, harsh croaks. Coots eat seeds and leaves of aquatic plants, insects, tadpoles, and small fish.

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  • Moorhen head shot only

    ‘Alae ‘ula / Hawaiian moorhen

    Moorhens have chicken-like cackles and croaks. They eat mollusks, insects, water plants, and grasses.

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Restoration on the Refuge

Restoring Anchialine Pool

Kapolei High School students under the guidance of ES Biologist Lorena Wada and refuge staff have completed the restoration of an anchialine pool. The students helped operate small water pumps, removed earthen debris from the pool, washed and searched the spoil for paleontological avian bones.

Removing Mangrove Trees

Volunteers from the Hawai‘i Nature Center and military personnel from Joint Base Pearl Harbor-Hickam spent a muddy Saturday morning pulling and cutting young, exotic red mangrove trees from the mudflats along 600 feet of shoreline of the Waiawa Refuge Unit. These restored intertidal mudflats receive continuous use by endangered Hawaiian stilts and migratory shorebirds.

Helping the Refuge

Kalaeloa Unit Outplanting Endangered Akoko

Kapolei High School student volunteers outplanted 34 specimens of the endangered plant akoko on small prepared sites on the unit. Akoko is an imperiled species of dry coastal coralline habitat. This coastal habitat has been very heavily developed and fragmented. Only 13 plants from previous outplantings are known on the refuge and probably fewer than 50 exist anywhere in the wild.

About the Complex

Oahu National Wildlife Refuge Complex

Pearl Harbor National Wildlife Refuge is managed as part of the Oahu National Wildlife Refuge Complex.

Read more about the complex
About the NWRS

National Wildlife Refuge System


The National Wildlife Refuge System, within the U.S. Fish and Wildlife Service, manages a national network of lands and waters set aside to conserve America's fish, wildlife, and plants.

Learn more about the NWRS