Larus argentatus, also known as the Western Gull, is a large seabird commonly found in coastal regions of western North America. Some synonyms for this bird include the American Herring Gull, Pacific Gull, and the Grey-backed Gull. The Western Gull is easily distinguishable by its size and its distinctive yellow bill with a red spot. It has a pale gray back, white underparts, and a dark mantle. These gulls are scavengers and feed on a variety of food, including fish, crustaceans, and garbage. The Western Gull is a common sight in many coastal cities, where it is often seen perched on piers or scavenging for food.