This one seems to work pretty good.
A couple medium sized ones.

HW50S-.22, L3-9x33 EFR, sub zero or something laser light.

Usually I'll get 5-8 in a hours time around the farm. They won't stand in the green light long and you have to be fast on the trigger. A plus is you can see there eyes back in their hiding spots and pick them off inside them.
They also disappear and stay that way once you get a couple.
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