Friday Pic #2: Cracked
This week’s Pic was taken back in November when I spent a couple of weeks at a marine laboratory on the west coast of Sweden. On a walk along the beach I spotted this:
A seashell from a gastropod, lodged into a crack in the bark of a pine and cracked open. The shell was situated about a meter above ground, if I recall correctly, and there were more cracked shells and shell fragments on the ground beneath it.
I know woodpeckers and other birds lodge nuts and other food into the bark of trees to crack them open, and some shore-living birds bring shelled molluscs to certain rocks away from the shoreline where they crack and eat them. But I have never heard of a woodpecker gathering molluscs, taking them into the trees away from the shore, and lodging them into the bark just above ground! Of course, a human may have done this - possibly with the intent to confuse biologists - but that seems a bit unlikely.
Does anyone have an idea who might have done this?
