Gulls are among the most common waterbirds of ocean and coastal zones worldwide. There are more than 40 species of gull, including kittiwakes. Adult gulls are usually white or gray, sometimes with dark markings. They range in length from about 28 to 79 centimeters. A gull’s bill is strong and slightly hooked. Their wings are long and pointed, and gulls have a short squared tail.
Along the shore, gulls are helpful to the people who clean beaches and harbors. They swoop down to pick up messy things. Gulls eat almost anything, from dead fish and animals to potato chips. Gulls also follow fishing boats, feeding on offal and by-catch as it is discarded overboard. These birds eat all day long just to stay alive. While flying many miles without stopping, they use up a lot of energy. Some gulls travel enormous distances between their summer and winter homes.