Protection Island Refuge is located near the mouth of Discovery Bay in the Strait of Juan de Fuca in Jefferson County, Washington. Approximately 70 percent of the nesting seabird population of Puget Sound and the Strait of Juan de Fuca nest on the island, which includes one of the largest nesting colonies of rhinoceros auklets in the world and the largest nesting colony of glaucous-winged gulls in Washington. The island contains one of the last 2 nesting colonies of tufted puffins in the Puget Sound area. About 1,000 harbor seals depend upon the island for a pupping and rest area.