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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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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Nick Garbutt / RF - African lioness (Panthera leo) using Umbrella acacia tree (Acacia tortillis) as a lookout. Ngorongoro Conservation Area / Serengeti National Park, Tanzania. (This image may be licensed either as...
