The male appears more attractive to females, but he can not hunt because most optimally cry is upconverted, more it will fade quickly in the air, reducing the detection distance of objects and prey. It seems that the female preference for males with a higher frequency of echolocation may explain why this species to send forth a frequency 30 kHz above what is provided by the allometric relationship.
Inaonekana kwamba upendeleo kike kwa ajili ya wanaume na frequency juu ya echolocation inaweza kueleza kwa nini aina hii kwa apeleke frequency 30 kHz juu ya nini ni zinazotolewa na uhusiano allometric.