Jack Dykinga / Sandhill cranes (Antigone canadensis) and Snow geese (Chen caerulescens) at sunrise, Bosque del Apache National Wildlife Refuge, New Mexico, USA, November.

Jack Dykinga / Sandhill cranes (Antigone canadensis) feeding in pond, Bosque del Apache National Wildlife Refuge, New Mexico, USA. January.

Jack Dykinga / Sandhill cranes (Antigone canadensis) taking off and flying past a full 'super-moon' en route to feeding in neighboring fields. Bosque del Apache National Wildlife Refuge, New Mexico, USA, Jan...

Jack Dykinga / Sandhill crane (Antigone canadensis) in flight against blue sky, Bosque Del Apache, New Mexico, USA. December.

Jack Dykinga / Sandhill cranes (Antigone canadensis) in flight in late evening light, Bosque Del Apache, New Mexico, USA. December

Bernard Castelein / Sarus crane (Grus antigone), male displaying, Keoladeo NP, Bharatpur, India

Juergen Freund / Sarus Cranes (Grus antigone) Atherton Tablelands, Queensland, Australia

Edwin Giesbers / Sarus crane (Grus antigone) preening, captive

Jack Dykinga / Sandhill cranes (Antigone canadensis) taking off in dawn light. Bosque del Apache National Wildlife Refuge, New Mexico, USA, January

Jack Dykinga / Sandhill cranes (Antigone canadensis) preparing to take off and having a territorial dispute. Bosque del Apache National Wildlife Refuge, New Mexico, USA. January.

Jack Dykinga / Sandhill cranes (Antigone canadensis) arriving at their roost pond in sunset light. Bosque del Apache National Wildlife Refuge, New Mexico, USA, January.

Jack Dykinga / Sandhill cranes (Antigone canadensis) arriving at their roost pond in sunset light. Bosque del Apache National Wildlife Refuge. New Mexico, USA, January.