Gerry Ellis / Umbrella Thorn (Acacia tortilis) trees at sunrise on savannah, Masai Mara, Kenya

Diane McAllister / Lappet-faced vulture (Torgos tracheliotus) juvenile preparing for take off from the top of an Umbrella thorn tree, Tanzania

Richard Du Toit / Umbrella Thorn (Acacia tortilis) stands out against the dry grasslands of Masai Mara National Reserve, Kenya

Richard Du Toit / Cape buffalo herd {Synceros caffer caffer} grazing under large umbrella acacia thorn, Mala Mala Game Reserve, South Africa

Gerry Ellis / African Elephant (Loxodonta africana) group under Umbrella Thorn trees, Tarangire National Park, Tanzania