If all else fails, use the Havermeyer method from Catch-22:
Havermeyer had grown very proficient at shooting field mice at night with the gun he had stolen from the dead man in YossarianÂ’s tent. His bait was a bar of candy and he would presight in the darkness as he sat waiting for the nibble with a finger of his other hand inside a loop of the line he had run from the frame of his mosquito net to the chain of the unfrosted light bulb overhead. The line was taut as a banjo string, and the merest tug would snap it on and blind the shivering quarry in a blaze of light. Havermeyer would chortle exultantly as he watched the tiny mammal freeze and roll its terrified eyes about in frantic search of the intruder. Havermeyer would wait until the eyes fell upon his own and then he laughed aloud and pulled the trigger at the same time, showering the rank, furry body all over the tent with a reverberating crash and dispatching its timid soul back to his or her Creator.