James Campbell National Wildlife Refuge lies at the northernmost tip of the Hawaiian island of Oʻahu, between the town of Kahuku to the east and Turtle Bay to the west.

[7] Threats to wetland birds at the refuge include nonnative and invasive plants and animals and outbreaks of avian botulism.

Predation by free-ranging dogs, feral cats, rats, the nonnative American bullfrog, and the small Asian mongoose threatens birds and their nests.

[8] Because the Estate of James Campbell intended to sell large parcels in the Kahuku area by 2007, including lands surrounding the two refuge units, the Hawaii congressional delegation with support from state and city agencies and the local community introduced two bills to expand the refuge to a total of 1,100 acres (450 ha).

However, guided tours are offered on a limited basis twice a week and for special events and education outside the nesting season, generally between October and February.