Great Black-backed Gull (Larus marinus) - Opportunistic Feeder

Great Black-backed Gull on Trawler's Net

Great black-backed gulls are opportunistic feeders. They will eat almost anything that they can swallow. They are known scavengers, eating refuge from dumps and any items that have been washed up on shore, such as fish, skates, starfish, etc.
Great black-backed gulls are also highly predatory and will hunt and kill prey smaller than themselves.

During our visit to Provincetown harbor, I found the great Black backed gull searching for and feeding on remains that were stuck to a trawlers net.

Great Black-backed Gull on Trawler's Net Looking for Food

Great Black-backed Gull on Trawler's Net Looking for Food

Great Black-backed Gull on Trawler's Net Looking for Food

Great Black-backed Gull on Trawler's Net Looking for Food

Great Black-backed Gull on Trawler's Net Eating

Previously, I have observed  great black-backed gulls capturing and feeding on a juvenile black skimmer, starfish, and remains of fish.

Great Black-backed Gull Feeding on Juvenile Black Skimmer

Great Black-backed Gull Feeding on Juvenile Black Skimmer

Great Black-backed Gull With Starfish in  Its Mouth

Great Black-backed Gull Feeding on Fish Head