Figure 4.1 Hand-nets. Polythene around the lip prevents bats climbing out. Figure 4.3 Rotate the hand-net frame to ensure the bat cannot climb out. Figure 4.2 Use of hand-net to catch bats at the roost entrance. Always follow the safety code when using ladders. Figure 4.4 Cone trap. These can be constructed from a variety of smooth materials, such as acetate sheet. The collecting bag must be securely tied on.