Trapped or wounded specimens must be dispatched immediately. Bear in mind that the skull cannot be injured, as this is needed for taxonomic work. Therefore, the best procedure for smaller mammals is to kill them by forcing the air out of the lungs. Place your foot on the chest of afoot-trapped specimen and hold it for a moment, or else place the specimen in a canvas bag and depress the lungs between your fingers or with your foot. Large, dangerous mammals will have to be shot or drowned but should suffer the least amount of injury possible