Squirrels for me, each one if diffrent some are clever some are plain stupid. Can be very challenging this time of year. when you have 2-4 come in at once in the cover or along the ground form no where,i often take one with the hw77k .177 then grab the 12b to clear up the others,if they have ran. I've had 42 this year so far, most with the .177 . good sport ,good eating and good riddance!