Mayfly
Ephemeroptera
Mayflies are an order of winged insects characterized by aquatic larval stages and very short-lived adult forms. The larvae typically develop over a period of one to three years in various aquatic environments, whereas the adults do not feed and focus entirely on reproduction. They are unique among insects for possessing a winged subadult stage, known as the subimago, before the final molt into the adult imago.
Details
Identification
Usually three (rarely two) long tail filaments, membranous wings held vertically at rest, vestigial mouthparts in adults.
Social behavior
Larvae live solitarily on the water bed; adults often form massive, coordinated swarms over the water for mating.
Diet
Larvae are mostly detritivores or algae grazers; adults lack a functional digestive system and do not consume food.
Hunting strategy
Predominantly passive collection of organic material or grazing on biofilms.
Spawning substrate
Eggs are released onto the water surface or attached to underwater objects.
Overwintering
Overwintering typically occurs in the larval stage within the sediment or on aquatic plants.
Ecology
Ecological role
Important primary consumers in aquatic systems and a fundamental food source for fish, birds, and predatory insects.
Natural predators
Fish, dragonfly larvae, birds, bats, and spiders.
Competitor species
Other benthic invertebrates such as caddisfly larvae or chironomid larvae.
Ecosystem service
Nutrient transfer between aquatic and terrestrial ecosystems, bioindication of water quality.
Threats
Water pollution, pesticide runoff from agriculture, destruction of natural shore structures, and light pollution.
Scientific profile
Profile
Distinguishing features
Three (rarely two) long tail filaments; wings held vertically over the body at rest; vestigial mouthparts in adults; presence of a subimago stage.