thank you all for your messages. my pheasant aviary is around 25 square meters and around 2 meters high. i keep 3 females and a male. they seem happy and go broody every year ,one of the females is a living incubator machine she incubated 3 clutches of babies last year. she starts laying about a week after her last clutch has hatched .they are exelent mothers and very tame (they even allow me to check their eggs while they incubate although they bite my hands if i anoy them too much. the male is not very good with the babies so i keep mothers and babies seperate( the aviary has an door so it can be divided during breeding) for around 10 days by then the babies are fast and smart enough to avoid their bad manered father