They are twice the size (maybe more) than the garden variety grub I'm used to digging up in the yard. I found these today imbedded in a section of an old cut-down tree trunk that I was saving. I turned it over and it disintegrated -- the trunk was at least 12" diameter but there was nothing left of it except sawdust and these guys. To get them all out took some effort and I had to dig to get at a lot of them. There are 76 grubs here (yes, I counted), and if they survive, they'll be turtle food.....BUT WHAT ARE THEY; WHAT KIND OF CRITTER? And don't say Klingon gagh, LOL!