Songs of male tree crickets are analyzed by counting the pulses per second or chirping pattern. Species in the nigricornis and varicornis groups are measured by counting the pulses per second. Members of the genus Neoxabea, as well as species of the niveus group of the genus Oecanthus, are measured by the number of pulses per second within a burst. Species in the rileyi group are analyzed by the pattern of pulses in each chirp. Special attention is made of the number of chirps per minute -- as it is possible to estimate the temperature using a special formula involving the number of chirps.
An even longer 'chirp' of Oecanthus allardi which was found in Nicaragua. Note the 2 - 3 - 3 - 3 - 3 - 3 - 3 - 3 - 3 pattern. Analysis of a long string of chirps showed that the number of '3's varied from 5 - 11.