6.1 Short-duration marks For many projects it is sufficient to be able to recognise individuals or classes of individuals for periods of less than a year. Where circumstances permit, such temporary marks are generally preferable to permanent ones, because the potential for long-term damage is very slight. 6.1.1 Fur-clipping Fur, usually dorsal, can be cut with scissors. Often up to four distinguishable patches can be cut. This is a useful and harmless technique for identifying an individual or group temporarily. No known inconvenience is caused to the bats, but the mark may grow out rapidly (in 2–3 weeks) when bats are moulting (see Chapter 5). Clipped fur is often visible without handling the bat.