Many frogs glow in blue light, and it may be a secret, eerie language
In the dim twilight hours, many frogs may be capable of emitting a faint green or orange glow. A survey of hundreds of frogs in South America shows that far more frogs are biofluorescent than previously thought, researchers report in a preprint posted July 28 at bioRxiv.org. The ghostly colors may have a role in the frogs’ communication with members of the same species, the scientists say.