A few weeks ago I started working at a wild animal park & there are emus in the petting zoo area. They are accessible to the feeding public over a waist high wall. The last few days, one of the adult males has been getting very near to my face in an aggressive manner whenever I go in there. Today he sneaked up behind me & chest bumped me in the back. Scared the heck out of me simply because I never knew he was there & I screamed like a little girl! I almost went down...I then beat him about the face & neck with my cap until he backed off. I'm a vet tech but have no hands on experience with these birds. Is this breeding behavior? Any advice would be greatly appreciated as I don't want to hurt him but I don't want to be hurt either!