acacia tree baboon backlit baobab bird black blackandwhite brown buffalo cape buffalo cheetah closeup cloud crater rim crocodile dusk fog grass hill hippo hippopothamus lake manyara national park leopard lerai forest lilac breasted roller lion low key masai kopjies monkey mountain ngorongoro conservation area ngorongoro crater orange oxpecker pattern pink purple reflection savannah serengeti national park seronera seronera river silhouette storm sunrise sunset tan tanzania tarangire national park tree trees vervet monkey water wildlife yellow zebra