The Ring-billed Gull is a common species throughout eastern North America, breeding throughout the northern tier of the United States, whose northern border is the limit of its summer home. As a rule in winter it is found in Illinois and south to the Gulf of Mexico. It is an exceedingly voracious bird, continually skimming over the surface of the water in search of its finny prey, and often following shoals of fish to great distances. The birds congregate in large numbers at their breeding places, which are rocky islands or headlands in the ocean. Most of the families of Gulls are somewhat migratory, visiting northern regions in summer to rear their young. The following lines give with remarkable fidelity the wing habits and movements of this tireless bird: "On nimble wing the gull Sweeps booming by, intent to cull Voracious, from the billows' breast, Marked far away, his destined feast. Behold him now, deep plunging, dip His sunny pinion's sable tip In the green wave; now highly skim With wheeling flight the water's brim; Wave in blue sky his silver sail Aloft, and frolic with the gale, Or sink again his breast to lave, And float upon the foaming wave. Oft o'er his form your eyes may roam, Nor know him from the feathery foam, Nor 'mid the rolling waves, your ear On yelling blast his clamor hear." This Gull lives principally on fish, but also greedily devours insects. He also picks up small animals or animal substances with which he meets, and, like the vulture, devours them even in a putrid condition. He walks well and quickly, swims bouyantly, lying in the water like an air bubble, and dives with facility, but to no great depth. As the breeding time approaches the Gulls begin to assemble in flocks, uniting to form a numerous host. Even upon our own shores their nesting places are often occupied by many hundred pairs, whilst further north they congregate in countless multitudes. They literally cover the rocks on which their nests are placed, the brooding parents pressing against each other. Wilson says that the Gull, when riding bouyantly upon the waves and weaving a sportive dance, is employed by the poets as an emblem of purity, or as an accessory to the horrors of a storm, by his shrieks and wild piercing cries. In his habits he is the vulture of the ocean, while in grace of motion and beauty of plumage he is one of the most attractive of the splendid denizens of the ocean and lakes.