September on Long Island NY. A mix of warm days (70's & 80's) & warm nights (60's & 70's) - and - warm days(60's and 70's) and cool nights (50's and high 40's). Three times over the past three weeks, I've awakened to find the backyard lawn dug up like this. I have been replacing the turf & reseeding, but now I think I'll just have to rake it up & go from there. The yard is enclosed by a 5 ft. wooden fence (4 or 5 inch clearance at the bottom in a couple of places). The first two times the critters left the garden area completely alone, but this last time several places in the mulch were dug up as well (but no plants disturbed so far). Peeling back some turf myself, I've found a few grubs and a number of ants, but no more. There are opossums & racoons two blocks away in the wooded area around a parkway. Plenty of squirrels in the yards. I've found no other yard in the area affected by this. Any help would be appreciated. What might it be & what do I do about them and about the lawn? Thanks, Dennis M.