This occurs in many parrot species, cockatiels, macaws and budgerigars. It is a free-flight aviary featuring rosellas, macaws, cockatiels and budgerigars. Huge flocks of budgerigars, cockatoos, corellas and galahs are often sighted. Clearbody budgerigar mutation is one of approximately 30 mutations affecting the colour of budgerigars. The violet budgerigar mutation is one of approximately 30 mutations affecting the colour of budgerigars. The Blue budgerigar mutation is one of approximately 30 mutations affecting the colour of budgerigars. The Dark budgerigar mutation is one of approximately 30 mutations affecting the colour of budgerigars. Birds include the Australian hobby, nankeen kestrel, spotted harrier, mulga parrot and budgerigars. Breeders of English budgerigars show their birds at animal shows. Her other hobbies included gardening and breeding budgerigars and other birds. In both captivity and the wild, budgerigars breed opportunistically and in pairs. He spent most of his retirement in Summerhill, County Meath, breeding budgerigars and growing crops. The throat spots in budgerigars reflect UV and can be used to distinguish individual birds. Tame budgerigars can be taught to speak, whistle and play with humans. He is well known for his act with performing budgerigars.