Species designated "at risk" may be present in compatible plant or marine habitats at Sitka Sedge, but have not yet been observed: Oregon silverspot buttefly, seaside hoary elfin butterfly, Chinook salmon, coastal cutthroat trout, Coho salmon, chum salmon, steelhead trout, marbled murrelet, northern spotted owl, western snowy plover, red tree vole, and Pacific marten.