Figure 2: Representative search calls of five sympatric Myotis species in sonagram representation with time signal below and averaged power spectrum on the right.
From: Echolocation signals reflect niche differentiation in five sympatric congeneric bat species

a, Myotis nattereri; b, M. emarginatus; c, M. mystacinus; d, M. daubentonii; and e, M. dasycneme. See Methods for definition of search calls. Notches in signals (a, c) are caused by two-wavefront interference.