Charlie Summers / Yellow-billed oxpecker (Buphagus africanus) female perched on vehicle, Ngorongoro Crater, Tanzania, March.
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Charlie Summers / Yellow-billed oxpecker (Buphagus africanus) male outside nest hole, Ngorongoro Crater, Tanzania.
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Charlie Summers / Yellow-billed oxpecker (Buphagus africanus) male, showing bright coloured beak, Ngorongoro Crater, Tanzania.
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Richard Du Toit / Yellowbilled oxpecker (Buphagus africanus) on the back of Greater kudu (Tregalaphus strepsiceros) Kruger National Park, South Africa.
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Richard Du Toit / Yellowbilled oxpecker (Buphagus africanus) group of three of Buffalo, back of Kruger National Park, South Africa.
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Denis-Huot / Yellow-billed oxpecker (Buphagus africanus) cleaning a African buffalo (Syncerus caffer) Masai Mara Game Reserve, Kenya
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Denis-Huot / Yellow-billed oxpecker (Buphagus africanus) cleaning a African buffalo (Syncerus caffer) Masai Mara Game Reserve, Kenya