bats, now moles.............
moles or gophers logic? thinking more likely moles. they are in there because of the grubs. treat your lawn/septic field for the grubs. this is what they feed on. we also found a variety of other ways............open a mound, shove mouse/rat poison in it. done. kills the mole/s but doesn't take care of the grubs, another mole comes along and you start all over.
if it's gophers,open the mound, find the biggest smoke bomb at a fireworks store. baseball size smoke bomb, set the smoke bomb in, light it up, wait til it's smoking really good, lay a piece of plywood or something over the tunnel. smokes them out and sends the smell down the tunnel and they won't come back............might find them somewhere else..............
traps work about half the time or less for moles, don't bother, unless you want to experience frustration from them setting them off. just take care of the grubs, you won't have any moles.