Female zebra finches seek mate who sings one song just right

Humans aren't the only living beings who find a singing voice attractive in the opposite sex - songbirds do too. For about a third of the approximately 4,000 songbird species that sing only one song, the features that make these tunes alluring to a potential mate have been a long-standing mystery.

from Newswise Feature Channel: Sex and Relationships https://ift.tt/dflhQI3
via IFTTT