sentences:  The refuge protects the largest tidal salt marsh in the Coquille River estuary.The mudflats are rich in clam, crab, worm, and shrimp and attracts migrating shorebirds, waterfowl, coho salmon, as well as the California brown pelican.More common shorebird species include western and least sandpiper, semipalmated plover, black-bellied plover, Pacific golden plover, red phalarope, whimbrel, dunlin.