European Herring Gull in adult summer plumage. This gull is on the 'red list' for the highest conservation priority, the species needing urgent help Stock Photo - Alamy
Observations of a novel predatory gull behavior on an invasive ascidian: A new consequence of coastal urban sprawl? - Holman - 2019 - Ecosphere - Wiley Online Library
Herring gull | The Wildlife Trusts
Similar Species to Herring Gull, All About Birds, Cornell Lab of Ornithology
Similar Species to Herring Gull, All About Birds, Cornell Lab of Ornithology
Herring Gull | National Geographic
Glaucous-winged Gull, Western Gull, Herring Gull — Eastside Audubon Society
Caspian Gull - eBird
Gone gull: Climate crisis taking toll on seabird numbers, as more turn to urban scavenging | The Independent
Herring Gull Bird Facts | Larus Argentatus - The RSPB
SPEAKING of NATURE: Give gulls the respect they deserve | Lifestyle | fltimes.com