Skip to main content

Baetis buceratus (Scarce olive)

Baetis buceratus is a widespread, though localised species.  It has been recorded from rivers in Wales, the Midlands and South of England, but is absent from Scotland, Northern England and Ireland.  Nymphs of this species typically live amongst the sand and gravel in the riffle areas of rivers where they swim in short, darting bursts amongst the substrate.  They feed by scraping algae from submerged stones and other structures, or by gathering or collecting fine particulate organic detritus from the sediment. 

 

Little is known about the lifecycle of this species however adults have been collected between April and October.  It is thought that there are two generations a year, one with overwintering eggs that emerge in the spring and another that grows over the summer and emerges later in the year. Emergence of the adults probably takes place at the surface of the water during daylight hours.

 


J


F


M


A


M


J


J


A


S


O


N


D