Keen Sight. The seagull has advantage on Wisdom (Perception) checks that rely on sight.
Ocean Survivor. The seagull can drink salt water.
Mobbing. If threatened in its natural habitat, the seagull can emit repeated loud calls to attract a swarm of seagulls (use swarm of ravens stat block). The swarm arrives in 1d4+1 rounds and acts on the seagull's turn to confront the predators. The seagull becomes part of the swarm.
Beak. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 1 piercing damage.
Description
Seagulls (or "gulls") are tiny or small birds that live along coastal areas on cliffs, and coastal towns. They can also be seen in urban areas as long as there is food supply in the vicinity. They are usually grey or white, often with black markings on the head or wings. They have harsh wailing or squawking calls, stout, longish bills, and webbed feet. Most gulls are ground-nesting carnivores, which take live food or scavenge opportunistically.
At the DM's option, a raven can also use the seagull's mobbing trait in their natural habitat.