Have you seen the March Brown?
For anglers, the March brown Rhithrogena germanica is one of the most iconic mayflies. Although the species is in decline and under threat across Europe, the UK may be a stronghold.
The adult can be distinguished from all other similar mayflies by their early flight, mottled wings and dark spot on each leg. The nymphs live in rivers and streams, hatching into adults in large numbers between late March and the end of April. This hatch occurs often around mid-day and typically lasts for a very short period.
The over-winter development and early flight period of the March brown make it particularly vulnerable to environmental changes in these critical periods. We need to find out where this species occurs in the UK so that we can help protect it.
If you see this up-wing fly, please report your sightings on line here or download the postcard here. Hard copies are available on request, please reply with your address and the number of copies that you would like to receive.
There are already records coming in from a number of locations, including what seems to be the first record of the March brown from Cornwall. Remember that all your records are valuable, no matter where they come from.
See the website for information about the survey.
