Cosmosoma is a large genus of day-flying erebid moths (family Erebidae) found mainly in the Neotropics. Over time, these moths evolved to resemble stinging wasps, developing transparent wings and bold warning colours as a form of protection. Adult males are known to visit certain plants, such as Eupatorium, to consume toxic pyrrolizidine alkaloids. Accumulation of these chemicals in the moths bodies help defend them against predators like spiders and are also passed on to females during mating. This particular moth was not especially colourful, but it still showed several characteristic features of wasp moths. I found her resting on a tree during a visit to the city park of Puyo, a small town on the edge of the Amazon rainforest.