well there are all types of birds that can not fly for example the penguin well we all know that
A bird flies. If it was not semetrical, it would fly crooked. If birds flew crooked, there would be a bunch of birds flying around in circles. Sponges do not fly or even move, so they do not need to be semetrical.
The only bird that can fly backwards is the humming bird'
Every bird that can fly ahs wings to fly and legs to walk, all birds are born with legs.
a bird that cant fly
no you cant fly unless your have bird or something
fly with your wings
The ostrich is one.
you cant fly ? your not a bird? you dont have wings -_-
The Diebel bird, found in and around Pittsburgh.
no it cant even fly