Yes.
humming birds fly so fast because they are so fast
Time is but perception. If one perceives time as going fast than it "appears" to do so. When one is bored or waiting for something, time seems to slow as your perception slows as well.
If they fly very fast, they might not seewhere they are going
It may be to hunt for food.
to aviod being eaten
It moves it's wings so fast that it can fly!
Morning is the time the air is the calmest. As the sun comes out, it heats up the ground and lakes and causes air to rise to create turbelance. Most test flights are flown early in the morning. Also most rocket launches are performed early in the morning.
They are very slow
Fear is a great motivator.
its an american symbol; so not very
One is that they fly at well over 300mph, so they are very fast!
yes because it can fly fast so they can fly down and grab the cat. They only fly down and grab your cat if she/he messes with them or their babies.