I've seen swans in the sea before. Last year it the beach in Gdansk, Poland: it was about minus 10 degrees and there was ice on the sea and a group of 5 or 6 swans were swimming a few yards off the shore. I suspect that any nearby fresh water would have been frozen solid
They live in salt water They live in salt water
Because there food is under water
Not permently, Penguins live on land and swim in salt water to catch food.
just swim
no no reports have been made and they would not survive because most dolphins can only live in salt water
Salt. There maybe some obscure breed of penguin I am not thinking of that lives in fresh, but most of the ones you see in zoos and tv are salt.
no only salties or salt water crocodiles can swim for a very long time without coming up
salt water
no, they do not swim after they hatch.
Salt water has a slightly higher density, so it will be a little quicker to swim in fresh water.
Birds can't swim the way we do, but ducks and swans can definitely paddle with their feet. Other birds swim best when they are under water.
Because there is salt in sea water and salt makes you float better so is easier to swim.