> Very likely some sort of borer, belonging in the beetle family.
...
> As to the sounds they make, adults make some sort of crunching/chewing
> sound (depends on species) and most of the larvae (both those phases are
> destructive) usually make some sort of clicking sound, some sharp and
> others duller. Most of them prefer the pine family but I've seen borers
> in lots of species of wood.
Thanks for the clue. They do make a crunching noise, and there is a
little pine mixed in the wood pile.
I'll do some digging ala Gene and see what I find.