through their nose
If your talking about crows then yes, they caw while flying.
they sit
They usually do it to call in birds to mate.
NO!! If they did, they wouldn't fly!
59%
The skylark.
if something hits them
They do cast shadows.
No, birds cannot stay completely still in the air while flying. They need to constantly flap their wings to maintain lift and stay airborne.
Gravity
No- In Fact Canadian Geese Never Collide When Flying In Formation
No, Humming birds are for flying not for swimming.