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| Ocean salinity, currents and tidal action keep coastal waters open in the late fall and early spring, providing habitat for seabirds that rely on coastal waters or open ocean for food. An enclosed bay, estuary, and open ocean create habitat for migrating shorebirds and wintering marine ducks. |
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| Great Black-backed Gull |
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| Great Black-backed Gulls are the largest "sea gulls" on Plymouth Beach, and are present year round. They eat almost anything-- including marine invertebrates, human refuse, fish, and even other birds. They are considered a threat to the breeding birds on Plymouth Beach, including endangered and threatened species. Gulls of this species can be found anywhere on the beach, but are most common on the sand flats near the tip. |
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