Out walking on a crisp, wintry day, I found this case in a cleft in the bark of a local oak (a loakal?). I
can't claim to be too certain on what it is other than an empty pupae case - possibly from a moth? It is beautifully articulated, with striped segments not dissimilar to a wasp. It was attached to the tree with some silk, but the way it was wedged in to its deep crevice meant that it would have stayed without it. Its placement provided fantastic protection, which once it was empty was exploited by a little spider that scuttled out after I inadvertently dislodged it.