Great black-backed gull
Birds
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The great black-backed gull is the largest member of the gull family. Described by the Cornell Lab of Ornithology as "the king of the Atlantic waterfront", it is a very aggressive hunter, pirate, and scavenger. Wikipedia
Wingspan: 4.9 – 5.6 ft. (Adult)
Scientific name: Larus marinus
Mass: 4 lbs (Male, Adult, North Atlantic population) and 3.3 lbs (Female, Adult, North Atlantic population)
Conservation status: Least Concern (Population increasing)
Clutch size: 1 – 3
Class: Aves
Family: Laridae