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Brachycercus harrisellus (Large broadwings)

Brachycercus harrisellus has a widespread, though patchy distribution throughout the country.  The most northerly records are from the River Forth in Stirlingshire and the River Black Devon in Clackmannanshire.  Nymphs of this species live in the pools and margins of rivers and streams, where they burrow into, and live on mud and silt on the bed of the watercourse.  They are poor swimmers but are adapted for moving amongst mud and silt where they feed by collecting or gathering fine particulate organic detritus from the sediment. 

 

There is one generation a year, which usually overwinters as eggs and emerges in July.

 


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