Juergen Freund / Timelapse of Brolga cranes (Grus rubicunda) and Sarus cranes (Grus antigone) roosting at a waterhole, Bromfield Swamp, Wet Tropics World Heritage Area, North Queensland, Australia.

Rob Drummond/ BIA / Brolga (Grus rubicunda) crane, Victoria, Australia

Daniel Venema/ BIA / Brolga (Grus rubicunda), Queensland, Australia

Roger Powell / Brolga (Grus rubicundus) feeding on the edge of a field. Werribee Sewerage Works, Werribee, Victoria, Australia

Roger Powell / Two Brolgas (Grus rubicundus) against agricultural background. Werribee Sewerage Works, Werribee, Victoria, Australia

Juergen Freund / Brolga cranes (Grus rubicunda) in field as it is irrigated, Mareeba, Queensland,Australia.

Juergen Freund / Brolga pair (Grus rubicunda) in open savannah, Northern Territory, Australia.

Juergen Freund / Brolga cranes (Grus rubicunda) taking off from field with cattle, Bromfield Swamp, Atherton Tablelands, Queensland, Australia.

Juergen Freund / Brolga cranes (Grus rubicunda) in field, Bromfield Swamp, Atherton Tablelands, Queensland, Australia.

Juergen Freund / Brolga cranes (Grus rubicunda) in field, Bromfield Swamp, Atherton Tablelands, Queensland, Australia.

Juergen Freund / Brolgas (Grus rubicunda) group flying over field, Bromfield Swamp, Atherton Tablelands, Queensland, Australia.

Juergen Freund / Brolga cranes (Grus rubicunda) taking off from field with cattle, Bromfield Swamp, Atherton Tablelands, Queensland, Australia.