This looked like a wad of chewing gum stuck on the grocery store wall where I leaned my bike:

But it’s actually a moth with subtle decorations:

The poor thing would be much less conspicuous snuggled into a tree, but I suppose it’s doing the best it can with what’s available.
A quick riffle through the RTP Moth Book didn’t reveal any likely candidates, but there are a gazillion little brown moths in there, so I probably missed it.