Ephemeropteran is a term used to describe a type of insect which has a short lifespan, usually less than 24 hours. Some synonyms for ephemeropteran include mayfly, shadfly, and dayfly. These insects are well known for their incredibly short lifespan, which is spent mostly in their adult stage. Mayflies are found in freshwater habitats all around the world and can be important food sources for fish and birds. Despite their brief existence, these insects play an important role in ecosystems and are fascinating to observe in their natural habitats. Overall, the term ephemeropteran encompasses a fascinating group of insects that are essential components of many aquatic ecosystems.