Female damselflies prefer hot males, finds Japan study

Female damselflies prefer hot males, scientists have revealed.

It seems females prefer hot males, as they must have access to the sunnier spots along a river

Eggs laid in these warmer spots may develop faster and have a higher survival rate.

Mating with a male in a sunny patch may also allow a female to stay warm while laying her eggs in the cold water. That will increase her ability to escape from predators and other male damselflies.

Hotter males may also be better at defending their mates, say the researchers.

They hope to learn more details about the behavior, including how common it is among other damselflies.