By Joseph Castro, Live Science Contributor | June 17, 2014 09:32am ET
Male zebra finches prefer to form lifelong pair bonds with other males if they're raised by their dad alone, new research shows.
This mate choice is likely the result of males "imprinting" on their fathers, researchers say.
Zebra finches are socially monogamous, meaning that each bird pairs up with a single mating partner for the rest of its life. These tiny birds are also known to form lifelong same-sex pair bonds, though scientists aren't sure what factors influence the sex of the birds' partner choice.