Roland Seitre / Whistling hawk (Milan siffleur) hunting male Budgerigar (Melopsittacus undulatus) with wet wing feathers preventing it from escaping. Wannoo, Billabong Roadhouse, Western Australia.

Juergen Freund / Flock of Budgerigars (Melopsittacus undulatus ) drinking in an outback dam, Northern Territory, Australia.

Juergen Freund / Flock of Budgerigars (Melopsittacus undulatus) in flight, Northern Territory, Australia.

Juergen Freund / Flock of Budgerigars (Melopsittacus undulatus) in flight, Northern Territory, Australia.

Juergen Freund / Flock of Budgerigars (Melopsittacus undulatus) in flight, Northern Territory, Australia.

Juergen Freund / Flock of Budgerigars (Melopsittacus undulatus) in flight by outback dam, Northern Territory, Australia.

Rob Drummond / Budgerigar (Melopsittacus undulatus) pair at nest cavity, Queensland, Australia

Nick Upton / Veterinarian Dewi Jones clipping the beak of a Budgerigar (Melopsittacus undulatus) in his clinic, Wiltshire, UK, September 2014. Model released.

D. Parer & E. Parer-Cook / Budgerigar (Melopsittacus undulatus) juvenile, Trephina Gorge, Northern Territory, Australia

D. Parer & E. Parer-Cook / Budgerigar (Melopsittacus undulatus) female in nest cavity, South Australia, Australia

D. Parer & E. Parer-Cook / Budgerigar (Melopsittacus undulatus) male at nest cavity with female inside, South Australia, Australia

D. Parer & E. Parer-Cook / Budgerigar (Melopsittacus undulatus) male feeding female at nest cavity, South Australia, Australia