743-2254 - Lion (Panthera leo) showing flehmen grimace, Zimanga private game reserve, KwaZulu-Natal, South Africa

860-292448 - African Lion (Panthera leo) flehmen, Masai Mara, Kenya

860-292059 - Lion (Panthera leo). Male doing the flehmen response. Kalahari Desert, Kgalagadi Transfrontier Park, South Africa.

832-403324 - Lion (Panthera leo) . Male doing the flehmen response. Kalahari Desert, Kgalagadi Transfrontier Park, South Africa, Africa

860-290864 - Lion (Panthera leo) Flehmen reaction, Masai Mara National Reserve, National Park, Kenya *** Local Caption *** walking in the grass by rolling up the lips to register the pheromones of female in heat with her Jacobson glands

1116-51266 - A male lion (Panthera leo) shows the Flehmen response by opening his mouth wide as if he were roaring. He has a golden coat that glows in the warm early morning light. Shot with a Nikon D850 in Serengeti National Park; Tanzania

1116-51438 - Bighorn Sheep ram (Ovis canadensis) performs lip curl (flehmen display) in the North Fork of the Shoshone River valley near Yellowstone National Park; Wyoming, United States of America

1349-1206 - White-tailed deer

1116-44988 - White-Tailed Deer (Odocoileus Virginianus), Reddick, Florida, United States Of America

741-5354 - A male lion (Panthera leo), doing the flehmen grimace, Tsavo, Kenya, East Africa, Africa

764-5160 - Lion (Panthera leo) demonstrating the flehmen response, Ngorongoro Conservation Area, UNESCO World Heritage Site, Serengeti, Tanzania, East Africa, Africa

764-5119 - Lion (Panthera leo) demonstrating the flehmen response, Ngorongoro Conservation Area, UNESCO World Heritage Site, Serengeti, Tanzania, East Africa, Africa

832-17827 - Mouflon (Ovis ammon musimon), flehmen response during mating season

764-3456 - Bull elk (Cervus canadensis) demonstrating the flehmen response, Jasper National Park, Alberta, Canada, North America

987-67 - Red deer, Cervus elaphus, stag, sniffing the air, Kingussie, Scotland

987-177 - Red deer, Cervus elaphus, stag, sniffing the air, Kingussie, Scotland

764-3077 - Bison (Bison bison) bull demonstrating the flehmen response, Yellowstone National Park, Wyoming, United States of America, North America

764-2590 - Bull elk (Cervus canadensis) demonstrating the flehmen response during the rut, Jasper National Park, UNESCO World Heritage Site, Alberta, Canada, North America

764-1752 - Bull Elk (Cervus canadensis) with the Flehmen response during the rut, Jasper National Park, Alberta, Canada, North America

764-1740 - Desert Bighorn Sheep (Ovis canadensis nelsoni) ram in captivity exhibiting the Flehmen response, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America