Size
Gulls are generally larger than terns, with some species having wingspans of up to 6 feet. Terns, on the other hand, are smaller, with most species having wingspans of less than 3 feet.
Beak
Gulls have hooked beaks that are adapted for tearing flesh. Terns have long, pointed beaks that are adapted for catching fish.
Tail
Gulls have long, forked tails. Terns have shorter, square-shaped tails.
Diet
Gulls are scavengers and will eat a variety of things, including fish, insects, and garbage. Terns are primarily fish-eaters.
Habitat
Gulls are found in a variety of habitats, including coastlines, lakes, and rivers. Terns are found primarily in coastal areas.
Migration
Gulls are migratory birds and will travel long distances to find food during the winter months. Terns are also migratory, but some species only migrate short distances.
Calls
Gulls have a variety of calls, including squawks, honks, and mews. Terns have a more high-pitched, twittering call.
Intelligence
Gulls are considered to be one of the most intelligent bird species. They are able to learn how to open trash cans and steal food from humans. Terns are also intelligent, but they are not as well-known for their problem-solving skills.
Overall, gulls and terns are two distinct groups of seabirds with their own unique characteristics.