Hello, I’ve got two adult emus Nigel is around 5 years old and Edgar is around 3, I got them from an emu breeder thinking they were boys I got them both as chicks Nigel first as just a pet as boys were meant to be friendlier then decided I want to get into emu breeding but we had suspicions Nigel wasn’t a boy she was a girl as she booms and displays to the male rheas so I went and bought Edgar as a boy who then also started making the same noise as Nigel I’ve looked everywhere for a noise comparison to try and determine what they are but I can’t find anything they are both hand reared so not afraid of human but are both very aggressive now anyone have any ideas what they could be?