article_snippet: Stallions, like the wild mustang above,  use Stallions deep voices to attract the opposite sex, according to research .
article_snippet: The researchers say that Mares seem to make The researchers choices about unfamiliar males on The researchers first meeting based on the depth of The researchers voices.
article_snippet: Stallion acoustic signals may play a role in female attraction at the time of group formation, as well as a role in sexual stimulation or libido maintenance when a group is formed. '
article_snippet: This supports preliminary findings showing that females base females approach preference towards certain unfamiliar males on the amount of vocal signals uttered during females first encounter and some male vocal signals trigger mare behavioural preparation for mating, for example tail lifting and leg parting.'
article_snippet: Sound is an effective way for males to convey information to prospective mates and may be a way of avoiding the often violent fights that wild male rivals can engage in to win a mate.
article_snippet: Female humans have been found to find men with lower voices more attractive.
article_snippet: Koalas, bison and giant pandas have also been found to be more attracted to males with deeper calls.
article_snippet: Professor Lemasson added: 'Our data also confirm that not all male voices are equally attractive, opening new lines of bioacoustic research on mammal reproduction.'