David Williams / Piapiac (Ptilostomus afer) riding the back of cattle, Gambia
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Mike Wilkes / Black magpie (Ptilosomus afer) juvenile searching for food on ground, The Gambia
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Mike Wilkes / Black magpie (Ptilostomus afer) searching for food on ground, The Gambia, December
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Joel Sartore / Photo Ark / Piapiac (Ptilostomus afer) head portrait, Walsrode Bird Park, Germany. Captive, occurs in Africa.
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Joel Sartore / Photo Ark / Piapiac (Ptilostomus afer) portrait, Walsrode Bird Park, Germany. Captive, occurs in Africa.
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Joel Sartore / Photo Ark / Piapiac (Ptilostomus afer) head portrait, Walsrode Bird Park, Germany. Captive, occurs in Africa.
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Joel Sartore / Photo Ark / Piapiac (Ptilostomus afer) portrait, Walsrode Bird Park, Germany. Captive, occurs in Africa.
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Pete Oxford / African elephant (Loxodonta africana) standing in long grass with flock of Piapiacs (Ptilostomus afer) perched on its head and back, Uganda. Endangered.
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Neil Aldridge / White rhinoceros (Ceratotherium simum) calf walking through grassland while piapiac (Ptilostomus afer) birds feed on displaced insects around it, Ziwa Rhino Sanctuary, Uganda, March.
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Neil Aldridge / White rhinoceros (Ceratotherium simum) calf suckling whilst its mother grazes with piapiac (Ptilostomus afer) birds landing on her back, Ziwa Rhino Sanctuary, Uganda, March.