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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.
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). The nymphs are largely carnivorous and collect their food either through predation or scavenging. Ephemera simulans male
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The mayfly has come to symbolise the transitoriness and brevity of life. [74] The English poet George Crabbe, known to have been interested in insects, [75] compared the brief life of a newspaper with that of mayflies, both being known as "Ephemera", [76] things that live for a day: [77]
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Plants whose life cycle is significantly less than the time of a growing season are deemed ephemeral. [37] Winter annuals, Epilobium and Senecio vulgaris are examples of ephemeral plants. [37] [38] The conditions for ephemeral plants are markedly present in deserts. [38] Animals can be ephemeral, with brine shrimp and the mayfly being examples.
Ephemera are items which were not originally designed to be retained or preserved, but have been collected or retained. The word is etymologically derived from the Greek ephēmeros ‘lasting only a day’. [1] The word is both plural and singular. [2] One definition for ephemera is "the minor transient documents of everyday life".
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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