Happy to share our new @PNASnews paper, a multi-national team effort led by @JPLawrencePhoto aiming to understand how variation in warning signals can persist, and providing new perspectives on frogs' chemical defences (⚠️: toxicity≠unpalatability!) (1/n) pnas.org/content/early/… @PNASNews @JPLawrencePhoto In two populations of dyeing poison frogs displaying the same pattern but different colour, we deployed an army of clay models to test the reaction of wild predators to known and novel colour patterns. (2/n) #colsci