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Reindeer by mitchanx: Rangifer tarandus are thought to be the only mammals that can see ultraviolet light. A study in 2011 revealed that reindeer can see light with wavelengths as low as 320 nm, considerably below the human threshold of 400 nm. It is thought that this ability helps them to survive in the Arctic, because many objects that blend into the landscape in visible light, such as urine and fur, produce sharp contrasts in ultraviolet light. http://en.wikipedia.org/wiki/Reindeer…

Reindeer by mitchanx: Rangifer tarandus are thought to be the only mammals that can see ultraviolet light. A study in 2011 revealed that reindeer can see light with wavelengths as low as 320 nm, considerably below the human threshold of 400 nm. It is thought that this ability helps them to survive in the Arctic, because many objects that blend into the landscape in visible light, such as urine and fur, produce sharp contrasts in ultraviolet light. http://en.wikipedia.org/wiki/Reindeer…

Baby Barn Owl by Dysartian:   The Barn Owl does not hoot (such calls are made by typical owls, like the Tawny Owl or other Strix), but instead produces a characteristic shree scream, ear-shattering at close range. Nestlings are covered in white down all over, but the characteristic heart-shaped facial disk is visible soon after hatching.  http://en.wikipedia.org/wiki/Barn_Owl #Barn_Owl

Baby Barn Owl by Dysartian: The Barn Owl does not hoot (such calls are made by typical owls, like the Tawny Owl or other Strix), but instead produces a characteristic shree scream, ear-shattering at close range. Nestlings are covered in white down all over, but the characteristic heart-shaped facial disk is visible soon after hatching. http://en.wikipedia.org/wiki/Barn_Owl #Barn_Owl

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