harmless accidental intruder

6173  Hello,  I live in Burlington, Ontario and I found a very small worm/caterpillar on the wall. Can you ID it for me? It moved very slowly in a wave-like manner. Pics are attached. Any help would be greatly appreciated. Thanks    RM.

This is a caterpillar, but I cannot make a more specific determination from this image. At least it does not appear to be any of the common household pest species and thus likely to be a harmless accidental intruder. Ed Saugstad, retired entomologist; Sinks Grove, WV.