Denis-Huot / RF- Lion (Panthera leo) yawning, close-up of mouth and tongue showing spines, and bottom canine tooth, Masai-Mara Game Reserve, Kenya. Vulnerable species. (This image may be licensed either as rights...

Wild Wonders of Europe / Widstrand / RF- Spanish ibex (Capra pyrenaica) scenting tongue with air, Sierra de Gredos, Spain. November. (This image may be licensed either as rights managed or royalty free.)

Staffan Widstrand / RF- Bengal tiger yawning (Panthera tigris tigris). Bandhavgarh National Park, India. (This image may be licensed either as rights managed or royalty free.)