A study into zebra finches shows same-sex pairs of birds are just as faithful to each other as opposite sex pairs.
The research shows that animal relations can be more complicated than the concept of a male and female meeting and reproducing.
Researchers observed same-sex pairs interacting with each other the same as male-female pairs of finches.
Same-sex birds were closely monitored to see signs of bonding.
Bonding is identified as nestled together and nuzzling beaks among other characteristics.
Read more at BBC Nature