Gull

The seagulls (Laridae) form a bird family within the order of the Plover-type (Charadriiformes or waders and gull birds).
In addition to the actual seagulls, some authors also call the skuas (Stercorariidae),
the terns (Sternidae) and scissor beaks (Rhynchopidae) and sometimes also the alken birds (Alcidae) incorporated into this family.

Seagulls are medium to large birds. They have relatively long and narrow, pointed wings and strong, slender beaks with light weight
downwardly curved upper beak. The three forward toes are connected by webs, a fourth, very short,
Toe points to the back or is missing in some species.

Seagulls are mostly white-gray feathered, often with black coloring on the head, on the back and on the wings. The sexes differ
not in color, but males are a bit bigger. In many species, the juveniles are brownish colored. The larger gull species
It takes up to four years for full coloration, for the smaller ones, two years are normal. Many species have different
Breeding and rest clothes. Species with a dark head color in the breeding dress lose it in the resting dress and then have only a few dark ones
Stains on the sides of the head and neck.

(Wikipedia)