Why do ducks have webbed feet and gulls have webbed feet but the are different birds?

Oh, dude, it's like they both have webbed feet because they need to swim and catch food in the water, but they're different birds because, like, evolution decided to mix things up a bit. Ducks are like the chill swimmers of the pond, while gulls are the beach bums of the bird world, cruising along the shore looking for snacks. Nature's just out here doing its thing, man.