"To be honest, until I had got the photos on the computer I didn't know the drone were flying," said the man, who asked not to be named. "At first it looked like a bird or something like that ...

Mary Heiman was walking her dog around a lake in downtown Denver, Colorado, in late July when a bird started flying uncomfortably ... defensive of their chicks - "like a mama bear", she says ...

Some people were perplexed by the performance, while others simply wondered how someone can book such a gig like flying “bird ...