This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility: Researchers at the University of Galway in Ireland have found that venomous snakes are significantly more likely than nonvenomous species to have colors that stand out against their natural surroundings. Animals use color for many purposes, including camouflage, attracting mates and warning predators.
For some animals, however, being conspicuous can be a survival strategy. Wasps, poison dart frogs and coral snakes are among the best-known examples of species whose bold colors warn potential predators that they are dangerous. While warning coloration has been studied in individual species and small groups of animals, it has remained unclear whether conspicuous coloration is generally associated with venom across a large number of snake species.
In a study published in the Journal of Animal Ecology, the researchers examined more than 450 snake species from around the world, comparing how their coloration appears against the natural environments in which they live. The team compared snakes in their natural habitats by sourcing thousands of photographs through the citizen science platform iNaturalist. They examined whether venomous species were more visually distinct from their surroundings than nonvenomous species, looking in particular at red and yellow coloration, two colors commonly associated with warning signals in the animal world.
The study confirmed that while many venomous snakes are not brightly colored, a large number have evolved distinctive colors and patterns. It is further evidence of a link between venom and warning coloration, suggesting that the two traits may have evolved together in some snake species and that being highly visible may have served as a survival strategy by warning potential predators of danger. Amy Duclaux, from the University of Galway's School of Natural Sciences and a lead researcher on the project, said, "Our findings show that venomous snakes stand out from their natural background more than nonvenomous species, supporting the idea that warning coloration has evolved to signal danger to potential predators.
"Rather than hiding from predators, some venomous snakes appear to advertise that they're dangerous. Their striking colors likely evolved as warning signals that discourage attacks before they happen. "We also found that red and yellow coloration is particularly effective at helping snakes stand out against their natural background, suggesting these colors play an important role in visual signaling." Dr.
Kevin Healy, head of the Macroecology Lab at the university's School of Natural Sciences, said, "Citizen science initiatives such as iNaturalist are transforming ecological research by providing images of animals in their natural habitats at a scale that would otherwise be impossible for individual research teams to achieve. Museum collections allow us to measure color accurately, but photographs taken in the wild are essential for understanding how those colors appear in the environments where they evolved." The findings offer new insight into the evolution of warning signals, suggesting that for some venomous snakes, conspicuous coloration may be less about hiding from predators and more about making sure they are seen. The research also highlights how citizen science and large-scale image datasets are transforming the study of evolution across the animal kingdom.
Extract — continue reading at the source.
