Pacific Gull

Pacific gulls are the only large gulls in their range, besides the occasional kelp gull. This species can range in length from 58 to 66 cm (23 to 26 in) and span 137 to 157 cm (54 to 62 in) across the wings. They typically weigh from 900 to 1,180 g (1.98 to 2.60 lb). This species is mostly white, with dark wings and back, and a very thick (when compared to other gull species), powerful, red-tipped yellow bill. They have salt glands that secrete salty water through the nostrils. Young birds are mottled-brown all over, and attain their adult plumage only gradually; by its fourth year, a young Pacific gull has usually become difficult to tell apart from an adult bird. Of the two subspecies, the nominate eastern race prefers sheltered beaches, and the western race L. p. georgii is commonly found even on exposed shores. Both subspecies nest in pairs or loose colonies on offshore islands, making a cup of grasses and sticks in an exposed position, and laying two or three mottled brown eggs.

The gulls' diet consists of a number of various fish species and invertebrates. They frequently consume crabs, most often the species Ovalipes australiensis and Paragrapsus gaimardii. They also commonly eat Platycephalus bassensis (sand flatheads) and cephalopods, both of which are sourced from their regular consumption of waste from fish which have been cleaned on wharves and beaches. Additionally, they may eat insects, eggs, and other seabirds. The gulls may be found scavenging abattoirs and in rubbish tips, where they will often steal food from other birds.