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Ephemera vulgata can be told in both adult and subimago stages from the rather similar green drake (Ephemera danica) by its duller colour and slightly smaller size.The wings are more heavily veined and the upper side of the abdomen has pairs of dark lateral markings on each segment.
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The name Ephemeroptera is from the Greek ἐφήμερος, ephemeros "short-lived" (literally "lasting a day", cf. English "ephemeral"), and πτερόν, pteron, "wing", referring to the brief lifespan of adults. The English common name is for the insect's emergence in or around the month of May in the UK. [54]
Ephemerids are generally quite large mayflies (up to 35 mm) with either two or three very long tails. Many species have distinctively patterned wings. [2] They breed in a wide range of waters, usually requiring a layer of silt as the nymphs have strong legs which are adapted for burrowing (the group is sometimes known as burrowing mayflies).
A Guide to Common Freshwater Invertebrates of North America. McDonald and Woodward. Blacksburg, Va. 2002. 2 - Merritt and Cummins. An Introduction to the Aquatic insects of North America 3rd ed. Kendall Hunt. Dubuque, Iowa. 1996. 3- Brady, Valerie. "Ephemeroptera- the mayflies." 4/27/16.
Ephemera danica can reach an imago size of 15–20 mm (0.6–0.8 in) in males, while females are larger, reaching 16–25 mm (0.6–1.0 in). This mayfly, with its characteristic markings and three tails (), is the most commonly seen of British Ephemeridae.
Tricorythidae is a family of mayflies in the order Ephemeroptera. There are about six genera and at least 40 described species in Tricorythidae. There are about six genera and at least 40 described species in Tricorythidae.
Neoephemeridae is a family of large squaregill mayflies in the order Ephemeroptera. There are at least four genera and about 17 described species in Neoephemeridae. There are at least four genera and about 17 described species in Neoephemeridae.