penguin
An eagle flies and is a bird, a seal swims in arctic areas and is a mammal.
I am not sure of the name, But I've heard them called 'water turkey'
it is a bird that swims on water such as a swan or duck.
A penguin.
A bird that swims in the water, so I suppose you could say either bird or both.
Yamdena warbler is a bird species in Indonesia that flies.
Probably some species of bat.
Bird-That-Swims - A bird that doesn't fly, but swims Cowboy-Who-Rides-An-Ostrich Boat-That-Can't Stay Afloat Spotted Elephant Charley-In-The-Box Misfit Dolly
Insects such as flies, locusts and beetles, indigenous bird species and migrating birds, bats.
Road runner which is a desert bird that rarely flies.
Because - it floats on water. This means anything the swims in it will get coated in oil. That could be enough to kill an animal or bird. The human race is (allegedly) the most intelligent species on the planet - yet - WE are the only species that's causing problems for ALL other species !
A bird flies because of a variety of specialized adaptations. THAT IS WHY A BIRD FLIES!