Ok. Been down this road. I have 4 Roller Pigeons. Dark grey, white, dark brown and very light brown. Dark grey punks the dark brown pigeon while puffing it's neck below its beak. Even the sight of the dark brown pigeon gets him going. I though "ok" the dark brown is a female!!! ......until I saw the dark brown pigeon doing the same thing to the light cappuccino covered one. Only it sounded weird! It sounded muffled. Like a duck or something. The light brown pigeon seems to get along with everyone. The white also until it started doing the same thing as the Dark colored pigeon. The white pigeon punked the dark brown pigeon for white pigeons favorite perch. Then it started to coo the same way the dark brown one did. Weird??? Like a muffled duck, low noise without the spinning or depth the dark pigeon has. Going nuts here......though I can spend hours watching do their stuff.... Anyone think they can crack this one?????