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.
The findings “are a reminder to check our own perception as humans,” says Jennifer Lamb, a herpetologist at St. Cloud State University in Minnesota who was not involved with the research. “We are very visually dominant in terms of our senses. And other animals are too, but they might be experiencing that visual world differently than we are.”
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