The pupa is a transitional stage to the adult where its true legs, wings, and antennae form. In the case of a butterfly, the pupa is inside the chrysalis (other insects may spin cocoons or pupate in ...

During the nymph stage, they feed on algae and small plants; as adult mayflies, they do not have functioning mouths and cannot eat. This means an adult mayfly insect survives in adulthood for only ...