Ongoing, mainly August - September


Across Northern Ireland, especially Counties Fermanagh and Tyrone


  • Rose Cremin

54.3484522, -7.6491662

The Marsh Fritillary is one of our most threatened butterfly species, but can still be found in special grasslands in Northern Ireland and ROI, particularly in counties Fermanagh and Tyrone.

Marsh Fritillary Map

It is important to understand how this butterfly is doing in Northern Ireland, and we can monitor populations by counting the webs that the larvae make in late summer and early autumn. Volunteers are needed to help with this - have a look at the coloured dots on the map here to see if there are any Marsh Fritillary in your part of the country. To find out more about how to volunteer with this monitoring, please contact our Senior Conservation Officer in NI, Rose Cremin, at @email

Our work in Northern Ireland is supported by the Northern Ireland Environment Agency's Environment Fund.


Activity category
Public engagement