Michael Durham / Western Gull (Larus occidentalis) flock flying over the Oregon coast

Tim Fitzharris / Rocky coastline of Point Lobos State Reserve, California

Tim Fitzharris / Roseate Spoonbill (Platalea ajaja) flock wading in pond, Texas coast near Galveston

Fred Bavendam / Horseshoe Crab (Limulus polyphemus) group crawling ashore on the high tides of spring to lay their eggs in Delaware Bay's sandy beaches, New Jersey

Jeff Foott / Sunset along coast, Harris Beach State Park, Oregon

Jeff Foott / Coastal rocks, Harris Beach State Park, Oregon

Tim Fitzharris / Thunder Hole, Acadia National Park, Maine

Tim Fitzharris / Seastacks silhouetted at sunset, Ruby Beach, Olympic National Park, Washington

Theo Allofs / Daisies along coastline with sea stacks in background, Redwood National Park, California

Tim Fitzharris / Waves and surf at Wawaloli Beach The Big Island, Hawaii

Tom Vezo / Willet (Tringa semipalmata) feeding at shoreline, Rio Grande Valley, Texas

Michael Durham / Western Gull (Larus occidentalis) flock flying over the Oregon coast