Great Duck Island is a nesting seabird island located in the Gulf of Maine occupied by over 1200 pairs of gulls. Its proximity to the mainland, 12 km offshore, provides ample opportunity for Herring gulls (Larus smithsonianus) to feed themselves and their offspring in intertidal and freshwater habitats. Its location is also close to several nearby fisheries, including those for lobster and tuna. During June and July 2016, I collected regurgitate samples from adults and juveniles and prey remains around nests during the prefledging and fledging period. Regurgitation
samples were collected during handling of chicks for growth and banding studies. I used a protocol developed on the isles of Shoals (2016) which included five categories of prey for the Herring gulls of Great Duck Island, and examined the remains in greater detail.

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