That is a lens cap you see, lying on a bench in Dungeness Recreation Area. You might make out a loop of elastic strap dangling below the bench. Or not. The strap has an elastic loop that fits around a lens and then is glued to the cap. In theory, it keeps the cap from being dropped and lost. In practice, this lens leash got fatigued during the first day of our February snows. I was distracted as I took pictures. The falling snow was wet and I struggled to keep my camera dry.
The leash and cap slipped off my camera. I had an idea of where it happened, retraced my steps, walked in circles but it had disappeared into the soft drifts.
I got a new lens, of course. And a new leash which I now affix securely, differently. And, of course, look what I found on my first walk after the snow abated.