

Big Give 2025
22 April @ 12:00 – 29 April @ 12:00

Green Match Fund 2025
Have your donation doubled between 22nd – 29th April
Help secure a future for the Large blue butterfly
This month, we’re taking part in the Big Give Green Match Fund to raise £20,000 for conservation science.

About the Large blue
The iconic Large blue butterfly is a globally endangered species and was declared nationally extinct in 1979.
Thanks to the unique expertise of our conservation science team over the past 30+ years we have successfully reintroduced this rare species to Gloucestershire and Somerset, with new sites currently being identified. Seeing the Large blue fly across these landscapes has been a real conservation success story, one that truly bucks the trend of biodiversity decline.
However, over the course of the last ten years, there have been several extreme weather events which have seen the populations of these and associated species decline, making this iconic butterfly particularly vulnerable to climate change.
About the Big Give
The Big Give’s match funding campaigns offer a unique opportunity for you to double the difference you can make in the world for the causes close to your heart.
Their Green Match Fund is committed to amplifying the impact of every donation, doubling the difference for global efforts to protect and preserve our planet, making your support twice as powerful in driving meaningful change.
Help us raise £10,000 which will be match funded via Big Give – That means your contributions will be DOUBLED, giving us £20,000
The RES have a membership of over 5,000 entomologists and insect enthusiasts. Just £1 from each member takes us half way to our target.
Your kind donation will help to fund monitoring and vital equipment to carry out survey work:
- A donation of £20 could help to train new people to monitor Large blue butterfly populations.
- A donation of £50 could enable our team to undertake more ecological surveys on the current sites and research potential new sites for the species to thrive.
- A donation of £100 could support us with installing additional temperature data loggers on Large blue sites to monitor the impact of extreme weather events.
- A donation of £200 could pay towards the establishment of a new Large blue colony.