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

Marie Read / Canada geese (Branta canadensis) two during territorial fight in early spring, Ithaca. New York, USA

David Allemand / Two Snow geese (Anser caerulescens) during migration, with dark clouds against the sun, Quebec, Canada, October.

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

Marie Read / Canada goose (Branta canadensis) adult swimming leading five goslings, Ithaca, New York, USA.

David Pattyn / Canada goose (Branta canadensis) group of adults with young chicks. The Netherlands. June 2014

David Pattyn / Canada goose swimming portrait (Branta canadensis) The Netherlands. March 2013.

Jack Dykinga / Sandhill crane (Grus canadensis) landing in icy pond filled with snow geese (Chen caerulescens) Bosque del Apache, New Mexico. January 2013

Laurent Geslin / Canada goose (Branta canadensis) grazing at Walthamstow reservoir, London, UK

Laurent Geslin / Two Canada geese (Branta canadensis) amongst grass and flowers. Walthamstow reservoir, London, UK

Laurent Geslin / Canada goose (Branta canadensis) with two chicks / goslings in tall grasses, Walthamstow reservoir, London, UK

Philippe Clement / Canada goose (Branta canadensis) swimming with goslings in lake, Belgium, May