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Caenis luctuosa (Anglers' curse)

Caenis luctuosa has a widespread distribution, although it is scarce in the north of Scotland.  The majority of records for this species are from the South East of England, however due to the problems with the identification of nymphs, it is difficult to compile a complete distribution for this species.  Caenis luctuosa is thought to be more common than C. macrura.  Nymphs of this species live in the pools and margins of rivers or on lake shores, where they live in silt trapped between larger stones and gravel.  They nymphs are poor swimmers but are adapted for moving amongst the sediment.  They feed by collecting or gathering fine particulate organic detritus from the sediment. 

 

There is either one or two generations a year, one of which overwinters as nymphs.  Adults have been recorded between June and September.

 


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Emergence of the adults typically takes place partially or entirely out of the water on a stick, stone or plant stem at dusk.  The males of this species can be found swarming at dawn.