Gerry Ellis / Umbrella Thorn (Acacia tortilis) trees at sunrise on savannah, Masai Mara, Kenya
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Jen Guyton / Rainbow above Umbrella thorn acacia (Vachellia tortilis) Serengeti National Park, Tanzania.
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Wim van den Heever / Umbrella Thorn tree (Vachellia tortilis) at night with campsite below and stars above, Lake Ndutu Tanzania
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Wim van den Heever / Umbrella Thorn tree (Vachellia tortilis) at dusk, Lake Ndutu Tanzania
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Cheryl-Samantha Owen / Two African elephant bulls (Loxodonta africana) eating foliage under a dead Umbrella thorn tree (Vachellia tortilis) Amboseli National Park, Kenya.
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Cheryl-Samantha Owen / Dead thorn tree (Vachellia tortilis) silhouetted against the moonlight, Amboseli conservancy next to Amboseli National Park, Kenya
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Cheryl-Samantha Owen / African elephant (Loxodonta africana) with Umbrella thorn trees (Vachellia tortilis) in the background. Amboseli National Park, Kenya.
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Cheryl-Samantha Owen / Umbrella thorn tree (Vachellia tortilis) alive tree and dead tree, Amboseli National Park, Kenya.
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Cheryl-Samantha Owen / African elephant bull (Loxodonta africana) feeding on foliage under a dead Umbrella thorn tree (Vachellia tortilis) Amboseli National Park, Kenya.
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Thomas Marent / Umbrella Thorn (Acacia tortilis) trees at sunset, Serengeti National Park, Tanzania
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Thomas Marent / Umbrella Thorn (Acacia tortilis) trees at twilight, Serengeti National Park, Tanzania
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Eric Baccega / Weaver bird (Ploceidae) nests in Umbrella Thorn acacia (Umbrella acacia tortillis) Samburu National Reserve, Kenya, Africa.
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Eric Baccega / Weaver bird (Ploceidae) nests in Umbrella Thorn acacia (Umbrella acacia tortillis) Samburu National Reserve, Kenya, Africa.
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Eric Baccega / Weaver bird (Ploceidae) nests in Umbrella Thorn acacia (Umbrella acacia tortillis) Samburu National Reserve, Kenya, Africa.
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Mark MacEwen / Reticulated Giraffe (Giraffa camelopardalis reticulata) close up eating the Umbrella Thorn Acacia (Acacia tortilis) Ol Pejeta Conservancy, Kenya, Africa.
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Mark MacEwen / Reticulated Giraffe (Giraffa camelopardalis reticulata) head close up, eating Umbrella Thorn Acacia (Acacia tortilis), Ol Pejeta Conservancy, Kenya, Africa.
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Mark MacEwen / Umbrella Thorn Acacia (Acacia tortilis) at sunrise, Ol Pejeta Conservancy, Kenya, Africa, August 2011
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Diane McAllister / Lappet-faced vulture (Torgos tracheliotus) juvenile preparing for take off from the top of an Umbrella thorn tree, Tanzania
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Richard Du Toit / Umbrella Thorn (Acacia tortilis) stands out against the dry grasslands of Masai Mara National Reserve, Kenya
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Richard Du Toit / Cape buffalo herd {Synceros caffer caffer} grazing under large umbrella acacia thorn, Mala Mala Game Reserve, South Africa
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Gerry Ellis / African Elephant (Loxodonta africana) group under Umbrella Thorn trees, Tarangire National Park, Tanzania
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Emanuele Biggi / Umbrella thorn tree (Vachellia tortilis) in the Etosha pan with common ostrich (Struthio camelus) male. Etosha National Park, Namibia
