Immature mayflies are aquatic, and are known as nymphs or naiads. In contrast to their short lives as adults, they may live for several years in the water. They have an elongated, cylindrical or somewhat flattened body that passes through a number of instars (stages), moulting and increasing in size each time. When ready to emerge from the water, nymphs vary in length, depending on species, from 3 to 30 mm (0.12 to 1.18 in).3
Unless they hit my windshield. One night on I-70 in Missouri I crossed the Missouri river and suddenly I couldn’t see anything. Me and all the trucks around me immediately got off the expressway to a truck stop to wash all the mayflies off our windshield. Not a pretty smell either.
Night-Gaunt49[Bozo is Boffo] over 7 years ago
From Wikipedia::
Immature mayflies are aquatic, and are known as nymphs or naiads. In contrast to their short lives as adults, they may live for several years in the water. They have an elongated, cylindrical or somewhat flattened body that passes through a number of instars (stages), moulting and increasing in size each time. When ready to emerge from the water, nymphs vary in length, depending on species, from 3 to 30 mm (0.12 to 1.18 in).3
drivingfuriously Premium Member over 7 years ago
Unless they hit my windshield. One night on I-70 in Missouri I crossed the Missouri river and suddenly I couldn’t see anything. Me and all the trucks around me immediately got off the expressway to a truck stop to wash all the mayflies off our windshield. Not a pretty smell either.