Sven Zacek / Brown bear (Ursus arctos) in coniferous forest. Ida-Virumaa, Eastern Estonia. September.

Pal Hermansen / Brown bear (Ursus arctos), two showing aggression at night. Finland. August.

Pal Hermansen / Bear (Ursus arctos) silhouetted at night under starry sky. Finland. August.

Chase Dekker / Brown Bear (Ursus arctos) in river, Katmai National Park, Alaska

Danny Green / Brown bear (Ursus arctos) in autumnal forest, Finland, September

Danny Green / Brown bear (Ursus arctos) in autumnal forest, Finland, September

Danny Green / Brown Bear (Ursus arctos) in the snow, Finland, April

Donald M. Jones / Brown Bear (Ursus arctos) feeding on dandelions, western Canada

Donald M. Jones / Brown Bear (Ursus arctos) feeding on dandelions, western Canada

Tui De Roy / Brown pelican (Pelecanus occidentalis) feeding chicks at nest, Puerto Ayora / Academy Bay, Santa Cruz Island, Galapagos

Tui De Roy / Brown pelican (Pelecanus occidentalis) feeding chicks at nest, Puerto Ayora / Academy Bay, Santa Cruz Island, Galapagos

Tui De Roy / Split level view of Brown pelicans (Pelecanus occidentalis) feeding, Tortuga Bay, Santa Cruz Island, Galapagos