<Tr> <Td_colspan="2"> <Ul> <Li> Pannota </Li> <Li> Schistonota </Li> </Ul> </Td> </Tr> <Ul> <Li> Pannota </Li> <Li> Schistonota </Li> </Ul> <P> Mayflies (also known as Canadian soldiers in the United States, or shadflies or fishflies in Canada and Michigan; also up - winged flies in the United Kingdom) are aquatic insects belonging to the order Ephemeroptera . This order is part of an ancient group of insects termed the Palaeoptera, which also contains dragonflies and damselflies . Over 3,000 species of mayfly are known worldwide, grouped into over 400 genera in 42 families . </P> <P> Mayflies are relatively primitive insects and exhibit a number of ancestral traits that were probably present in the first flying insects, such as long tails and wings that do not fold flat over the abdomen . Their immature stages are aquatic fresh water forms (called "naiads" or "nymphs"), whose presence indicates a clean, unpolluted environment . They are unique among insect orders in having a fully winged terrestrial adult stage, the subimago, which moults into a sexually mature adult, the imago . </P>

Are canadian soldiers and mayflies the same thing