Insectivorous birds fly in circles to catch flying insects.
all of them if they want to
because they are searching their food
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.
by letting people fly around in circles and around
they can fly forwards, back and around.
around 40
yes birds do have limits birds cannot fly all around the world without resting
Bugs are attracted to the lights in the intersections, therefore there is food for the birds.
It is not only birds that fly. Bats fly and they are not birds.
Most birds can fly. Not all.
To say that birds use wings and feathers to fly, so all birds can fly, would be false. Not all birds can fly. An ostrich is an example of a bird that cannot fly.
The birds that can fly because it is easier for them to find food.
all birds fly xept penguins
it will sense you as a threat and will fly around in circles while brandishing a disco ball in self defense.