Pyrenean Desman (Galemys pyrenaicus), the weird aquatic mammal living only in a small patch of coastal and mountain streams around the borders of France, Spain and Portugal. Despite living in Europe, by far the best researched continent in terms of biodiversity, very little is known of this nocturnal and elusive creature. It is known, though, that it's no shrew, even though it looks a bit like one. Instead, it's closely related to moles.
It's the first of a series of weekly bioillustration things I'm making for my blog (for the time being, in Finnish only. Sorry.)