Diane McAllister / Polar bears (Ursus maritimus) fighting in water. Beaufort Sea , Kaktovik, Alaska, USA. Highly commended in the Polar Passion category of the Nature's Best Photography Competition 2019.

Diane McAllister / Japanese Macaque (Macaca fuscata) female holding baby close in snow, Jigokudani, Japan.

Diane McAllister / Japanese Macaques (Macaca fuscata) enjoy time soaking and grooming in the hot spring in Jigokudani, Japan.

Diane McAllister / Japanese Macaque (Macaca fuscata) pair rest together on a rock near the river in Jigokudani, Japan.

Diane McAllister / Japanese Macaque (Macaca fuscata) adult with wet snowy head in the hot springs of Jigokudani, Japan.

Diane McAllister / Japanese Macaque (Macaca fuscata) juvenile riding on its mother's back, along snow trail in Jigokudani, Japan.

Diane McAllister / Japanese Macaque (Macaca fuscata) adult in the hot springs of Jigokudani, in the snow, Japan. February

Diane McAllister / Japanese Macaque (Macaca fuscata) juvenile portrait, Jigokudani, Japan. February

Diane McAllister,Diane McAllister / Japanese Macaque (Macaca fuscata) juvenile approaches the hot springs and feeding area covered in icy snow from the cold night before in Jigokudani, Japan, January

Diane McAllister,Diane McAllister / Japanese Macaque (Macaca fuscata) young one, appearing quite relaxed in thermal pool, even falling asleep, in Jigokudani, Japan, February

Diane McAllister,Diane McAllister / Japanese Macaque (Macaca fuscata) male and female huddle together during a light snowfall in Jigokudani Japan, January

Diane McAllister,Diane McAllister / Japanese Macaque (Macaca fuscata) with icy strands of fur on its head, Jigokudani, Japan, February