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Karl Martens, WrenSold
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Karl Martens, Great Grey OwlSold
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Karl Martens, Tawny Owl FlyingSold
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Karl Martens, Short-Eared Owl
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Karl Martens, Long-Eared OwlSold
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Karl Martens, Long-Eared Owl ChicksSold
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Karl Martens, Nightjar Flying
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Karl Martens, Barn Owl FlyingSold
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Karl Martens, Eagle OwlSold
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Karl Martens, NightingaleSold
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Karl Martens, Barn OwlSold
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Karl Martens, Eagle Owl FlyingSold
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Karl Martens, WoodcockSold
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Karl Martens, WrenSold
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Karl Martens, HedgehogSold
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Karl Martens, Wood Mouse ISold
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Karl Martens, Wood Mouse IISold
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Karl Martens, NightjarSold
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Karl Martens, Tawny OwlSold
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Karl Martens, Long-Eared OwlSold
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Karl Martens, Long-Eared Owl ChicksSold
Karl Martens: Twilight in the Woods
Past exhibition