Sebastian Kennerknecht / Sea Otter (Enhydra lutris) veterinarians Mike Murray and Marissa Viens performing surgery on rescued otter as volunteers look on, Monterey Bay Aquarium, Monterey Bay, California
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Chris Gomersall / Eye spot on wing of owl butterfly (Caligo genus)
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Pete Cairns / Close-up of Common alder leaf {Alnus glutinosa}, Scotland, UK.
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Sebastian Kennerknecht / Sea Otter (Enhydra lutris) veterinarians Mike Murray and Marissa Viens performing surgery on rescued otter, Monterey Bay Aquarium, Monterey Bay, California