There are 2,500 known species of mayfly generally found close to water, all around the world with over 600 species of mayfly natively found in North America. Mayflies are extremely sensitive to pollution and can therefore only be found close to water that is of a high quality.
Adult mayflies tend to be herbivorous only really surviving on algae although there are a number of known mayfly species that prey on other insects. The adult mayfly has a very short lifespan which can be anywhere from to half an hour to a few weeks long.
The adult mayflies have a number of predators out of the water including amphibians such as frogs, toads and newts, small reptiles, birds and even rodents and mammals. However, the aquatic longer-lived mayfly nymphs too have predators including fish and amphibians.
The female mayfly can lays thousands of eggs at time which she does so into the water. The mayfly nymph are aquatic and hatch in the water where they can take anywhere from a few months to more than a year to transform into an adult mayfly and head into the air.