Researchers age a Northern Saw-whet Owls (Aegolius acadicus) using ultraviolet (UV) light, which is a simple, effective means of distinguishing multip

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Researchers age a Northern Saw-whet Owls (Aegolius acadicus) using ultraviolet (UV) light, which is a simple, effective means of distinguishing multiple generations of flight feathers in owls. This permits easier and more accurate classification of age of adult owls.

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