Zebra (Equus quagga) putting head on another one's back, Serengeti, Tanzania, Africa

affection affectionate africa african animal animals another back behavior behaviour burchells common equidae equus exterior exteriors fauna head hooved kingdom mammal mammalia mammalian mammalians mammals nature nobody odd on ones outdoor perissodactyla photo photos plains putting quagga rest rested resting rests savanna savannah serengeti shot shots social tanzania tender tenderness toed two ungulate ungulates upon vertebrata vertebrate vertebrates wild wildlife world zebra zebras