Neither Gulls nor Terns can dive far under water like Ducks, for their bodies are too light; but they all pounce down on wing and contrive to catch small fish swimming just below the surface.
"Look at the difference between the flight of the two! The Tern half folds his long pointed wings, and darts down like lightning; in a second he is up in the air again dashing off with capricious flight, holding his beak to his breast as the Woodcock does.

But the Gull sails more slowly, settles deliberately, and often floats quietly on the surface; then when he rises on wing, with some ceremony, he flaps off with his beak held straight before him, like a Duck.

Terns are the better flyers, but Gulls are decidedly the more expert swimmers." "Are Gulls and Terns related ?" asked Dodo.
"They both belong to one family of many members.

These two that you have been watching are among the best known of all--the American Herring Gull, who lives on both lake and ocean; and the Common Tern, who mostly follows the sea-coast." "Heads down!" called Olaf.

The boom swung round, the sail dropped, and the boat ran into the shallow water of the beach at Great Gull Island.
"You haven't given us any Duck tables, Uncle Roy," said Dodo.
"You cannot stop on this hot sand to write them out; but I will remember to give them to you as soon as we get back to the cabin." "When shall we ever see these Ducks ?" sighed Dodo, thinking of the long list there would be to write; "because I can remember better when I see things than if I only hear about them." "Do you realize that when you go back to the Farm, it will be time for birds to begin their autumn journeys, and that they will be passing by until the snow is on the ground?
Why may you not meet some of these Ducks by the river, or see them swimming on the pond?
Or, if you are not so lucky, you must look for them in markets and museums.