This gull certainly knows how to fish and feed himself. His parents prepared him well for his first winter here in New England. We first started seeing great black-backed gulls here in 2012 and it seems they are here to stay. Their huge size (length 25-31″/64-79 cm), compared to other kinds of gulls, always impresses me.
This very large, black-backed, pink-legged gull is the largest gull in the world, and males in particular are massive.
~ Steve N. G. Howell & Jon Dunn
(Gulls of the Americas)
It takes four years for these gulls to finally get their adult plumage. This one seems to be off to a good start. They can live for over twenty years.