832-398577 - Hippos (Hippopotamus amphibius) yawning, the animal opens its mouth upward at the sky. Black and white image. Hwange National Park, Zimbabwe, Africa
1350-200 - Polar Bear (ursus maritimus) with relaxed yawn in Fireweed (Epilobium angustifolium) on sub-arctic flower covered island at Hubbart Point, Hudson Bay, near Churchill, Manitoba, Northern Canada..
1116-47594 - Female Brown bear (Ursus arctos) looking at camera with mouth open, captive in Alaska Wildlife Conservation Center, South-central Alaska, Portage, Alaska, United States of America
860-286920 - Adult male Polar Bear (Ursus maritimus) yawns while resting on drifting pack ice near mouth of Wager Bay and Ukkusiksalik National Park, Nunavut Territory, Canada