Swallows.
They wait for the birds to return.
It is not only birds that fly. Bats fly and they are not birds.
In spring, many bird species fly north as they return to their breeding grounds. This migration is driven by the availability of food and suitable nesting habitats that emerge as temperatures warm. Conversely, in the fall, these same birds typically migrate south to escape colder weather.
Migratory birds fly south during autumn and return north in spring.
Swallows fly to Capistrano between March and October during their annual migration. They usually arrive in late March and depart by early October.
Most birds can fly. Not all.
Sience 1910
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
Birds sing in the spring.
Birds Fly South was created in 2001.