A bird will fly outdoors or indoors, birds just fly.
that you've left a door or window open probably.
Close your windows!
You need to catch it
This means that there is a bird there or that there is a bird close making the shadow.
When a bird flies at you and hits you it typically means they were unable to see you. It is also possible that they were protecting their young or they have some sort of illness.
You better get a net.
It fell off the chimney pot.
It means that was a tough and lucky bird. Other than that it means nothing whatsoever.
A bird flies because of a variety of specialized adaptations. THAT IS WHY A BIRD FLIES!
well it flies an hour long... did you mean how far?
It means that the bird hit your window so hard that it died.
Mariah Carey sings "She Flies Like a Bird"
Bird
A humming Bird
It might have just been a stupid bird or it might have short sight or it might have seen its reflection and thought it was another bird it all depends on what type of bird it was.