These two boards had traps screwed on them and Slid up to the entry hole, the "Red-pine's" and "Grey"s were entering in two holes close to each other. On the left was an AES 4x4x18 cage Trap and on the board to the right was a Pine box with lid and hole, inside was a Victor wooden Rat trap.
This set up yielded 5 piney's and 4 Greys when the Pine squirrels tried the wood box they were Dead on arrival , when the Grey's tried they Got wacked, fell down the roof and expired on the ground, two of the greys were Stunned but not dead when I arrived. The job was in the late fall and the roof was Icy and steeper than it looked so I did the job this way.
I wouldn't Target Grey's with the Victor Rat Trap- if you were trying to 100% dispatch them.