Historically, the Center Islands were nesting sites for Caspian Terns. Bald Eagles, Double-crested Cormorants, Brant and other waterfowl, and many other gulls and shorebirds use the islands. During the highest tides, most of the shorebirds feeding in the North Bay of Gray's Harbor find refuge on the Center Islands. Sand Island is a primary roost, both day and night, for Brown Pelicans in Gray's Harbor. Because of the remoteness of these islands and the difficulty of observing birds there, no exact numbers are available regarding shorebird use in spring migration. However, if this is like other sites in Gray's Harbor, the shorebird use in spring is much greater than in fall and winter. Thus, this site's importance is likely under-represented by the fall and winter data listed below.
The Center Islands are a Natural Area Preserve managed by the Washington Department of Natural Resources. Erosion, pollution, and human disturbance are minor threats. Compared to sites on the mainland, the habitat is relatively secure.
2013 Assessment based on BLM Oregon/Washington Surface Management Ownership dataset (http://www.blm.gov/or/gis/data-details.php?data=ds000011) and Washington Department of Natural Resources Aquatic Land Ownership Parcels (http://fortress.wa.gov/dnr/app1/dataweb/dmmatrix.html).