Female African treefrogs mate with several males simultaneously; together they whip up a larger foam nest that protects hundreds of eggs from drying out

• This group nest-building behaviour provides a fresh explanation for why females in many animal species mate with multiple partners, according to a study written by Phillip Byrne and Aimee Silla in The Conversation.
• The findings offer field evidence for a new scientific idea called the "nesting-assistance hypothesis", created by a team of