They use their tails to propel themselves backwards.
That is why they have webbed feet So a larger area to propel through water
It is impossible for any bird to fly directly backwards. Unless the wings were put on backwards it wont work, as the wings are designed to propel forward.
Prawns generally prefer to walk on the bottom of their habitats. They don't really "swim" as we think of it, but use a swift contraction or two of their tails to propel themselves backwards very quickly to escape danger.
flagelium
flagellum. (:
A fish uses its fins to push water backwards and propel itself forwards.
They use their legs to push themselves off the ground or the water to propel themselves.
Ducks do not clean their young, their young are quite capable of cleaning themselves.
NO. The tail of the sperm can only propel it forward.
Flagellum
Not at night when they are asleep like human beingd