There are approx 2,500 species, world wide, in this order.
The adults are very short living, from several hours to a day. Their only purpose is to reproduce and they usually emerge en masse over a couple of days. They do not feed as adults.
The eggs are laid on the surface of lakes and streams and sink. The larvae (called Naiads) feed on algae although some are predatory. They moult several times, before the adult stage, over one to several years (depending on species).
A family of about 150 species in the sub order Schistonota.
These are generally quite large mayflies (up to 35 mm) with either two or three very long tails. Many species have distinctively patterned wings.
The term 'Burrowing Mayfly' refers to the naiads which have strong legs to burrow in the silt.
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