eagles,herons,cranes,storks.
it is a bird, it just can't fly because it doesn't have the right kind of wing bone
Past tense: The flock of birds was flying. Present tense: The flock of birds is flying. (flock is a collective noun)
yes
Most birds are flying. The factual reason for why is a bit hard to come by.I would simply suggest that they started to fly due to a genetic development over time.All life on earth started in the sea....