“…Mating calls are species -specific because they function as a species (or even sub-species) isolation mechanism (Marler, 1967;Green field, 1997). The differentiation of social calls in P. hanaki has possibly played a role in the divergence of this species from P. pygmaeus, as in other bats (Jones, 1997;Kingston et al, 2001) and also in birds (Catchpole, 1987), frogs (Feng et al, 2006), crickets (Honda-Sumi, 2005); even in primates (Braune et al, 2008). Alternatively, the unique type B social calls in P. hanaki may be the result of reproductive character displacement post speciation, as in rhinolophid bats (Russo et al, 2007), tree frogs (Höbel and Ger hardt, 2003) and crickets (Higgins and Waugaman, 2004).…”