Ross Hoddinott / 2020VISION / Wild garlic / Ramsons (Allium ursinum) flowering in woodland, Cornwall, England, UK, May.

Ross Hoddinott / 2020VISION / Wild garlic / Ramsons (Allium ursinum) flowering in woodland, Cornwall, England, UK, May.

Ross Hoddinott / 2020VISION / Wild garlic / Ramsons (Allium ursinum) in flower, controlled conditions, Cornwall, England, UK, May.

Staffan Widstrand / Polar Bear (Ursus maritimus) reflection in water, Svalbard, Norway

Steven Kazlowski / Spirit bear (Ursus americanus) sow with dark cub walking on a log at high tide, along the coastal rainforest of the central British Columbia coast, Canada

Steven Kazlowski / Portrait of Polar bear (Ursus maritimus) cub along the Bernard Spit during autumn freeze up, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, October 2011

Steven Kazlowski / Young Polar bear (Ursus maritimus) traveling across newly formed pack ice during autumnal freeze up, off the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska,...

Eric Baccega / Polar Bear (Ursus maritimus) mother with her 3-month cub, soon after emerging from their hibernation den. Wapusk National Park, Manitoba, Canada, March.

Eric Baccega / Polar Bear (Ursus maritimus) mother resting while her 3-month cubs play. Wapusk National Park, Manitoba, Canada, March.

Eric Baccega / Polar Bear (Ursus maritimus) walking on icepack with arctic coast in the background. Floe edge, Arctic Bay, Baffin Island, Nunavut, Canada, April.

Andy Rouse / Polar Bear (Ursus maritimus) mother and two cubs playing around iceberg. Svalbard, Norway, Europe, February.

Andy Rouse / close up portrait of a Polar Bear (Ursus maritimus), about three year. Svalbard, Norway, Europe, February.