The displayed sequence was recorded from a suspected M.ciliolabrum. The vertical ruler separates the sequence from the appended reference call. The horizontal ruler was adjusted to the lower characteristic frequency of the calls in the sequence (the frequency at which the call's frequency modulated sweep turns down to the tail). Note the consistency of this characteristic relative to the lowest, or terminal frequency of the calls. By comparing the sequence with this and other reference calls, the unknown sequence was determined to be most consistent with a M. ciliolabrum as suspected.