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Cetacean biologists can identify individual whales by the shape of their tail flukes*. I wonder whether similar criteria can be applied to leopard slugs? The markings on the mantles of these three are different. I'll go out again tonight and see whether I encounter the same individuals again. This time I'll photograph the mantles from directly above, so I can make useful comparisons between them. (Useful, of course, being a relative term.)
And then I'll have to give them names.
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* Which once led me into a very strange conversation with a whaleologist. I thought he was talking about intestinal worms ...