Black rhinoceroses (Diceros bicornis), Ngorongoro Crater, Tanzania, Africa

3 animals african africa alertness alert animals in the wild animals animal attention attentiveness attentive black rhinoceroses black rhinoceros black rhino concentrated concentration deserted diceros bicornis east africa eastern africa empty endangered animals endangered animal endangered species endangered specie fauna focused grassland habitat hook lipped rhinoceros looking out looking look out look mammalian mammalia mammals mammal np national parks national park natural environments natural environment natural habitat natural preserves natural preserve nature reserves nature reserve nature ngorongoro conservation area ngorongoro crater ngorongoro nobody no one no people odd toed ungulates odd toed ungulate pachyderms pachyderm perissodactyla protected area reserves reserve rhinoceros rhinocerotidae rhinos rhino sanctury savannah savannas savanna serengeti steppes steppe tanzania threatened species three animals travel photography travel unesco world heritage site unesco world natural heritage uninhabited volcanic craters volcanic crater watchful watch out wild animals wild animal wildlife photography wildlife world natural heritage