A piping plover (Charadrius melodus) keeps its three young safe by fitting them all underneath her.

Grey seal (Halichoerus grypus) that just woke up from a nap on South Monomoy.

Piping plover (Charadrius melodus) at Plymouth Beach.

A young gull tries to fly away with a decaying fish.

Piping plover (Charadrius melodus) sitting among human footprints.

Piping plover (Charadrius melodus) chick at sunrise on Plymouth Beach.

Herring gull (Larus argentatus) with a snack.

Sanderlings (Calidris alba) running along the shore line.

Great black-backed gulls (Larus marinus) and herring gulls (Larus argentatus) lift off the ground on a windy day.

Willet (Catoptrophorus semipalmatus) in flight.

A least tern (Sterna antillarum) keeps intruders out by dive-bombing.

A popsicle stick is used to mark the least tern (Sterna antillarum) nest.

Laughing gulls (Larus atricilla), herring gulls (Larus argentatus) and common terns (Sterna hirundo) at the low tide line during sunset.

Piping plover (Charadrius melodus) at sunrise.

A Northern harrier (Circus cyaneus) chick waits for his parents to come back to feed him the baby passerine that lies in the nest.