When doing field work to survey the insect populations, under the principle that the ecology should be disturbed as little as possible, the larvae are recorded and then immediately released, so it is necessary to bring a powerful microscope into the field to avoid human error.
若是碰到進行野外族群數目調查，為避免人為干擾自然生態，必須當場記錄、當場釋放的情況下，就只好隨身攜帶放大鏡式的眼鏡，或是百倍的顯微鏡，以免肉眼誤判。