A conservationist in Wales is halfway through a groundbreaking two-year research project that could transform how we track the health of the nation’s peat bogs. Georgina Paul, collaborating with Butterfly Conservation, is investigating whether the threatened large heath butterfly might serve as a dependable measure of peat bog condition across some of Wales’s most valuable wetland environments. The project, which began last year and will continue to May 2027, requires counting large heath populations across hundreds of square kilometres of protected peat bogs, from Ceredigion to the Wrexham-Shropshire border. If successful, the research could provide volunteers with a straightforward yet powerful way to track environmental changes whilst simultaneously helping tackle climate change by guaranteeing these vital carbon stores remain in good condition.
The Large Heath as Ecological Indicator
The great heath butterfly, with its distinctive chestnut colouring and prominent black markings, has emerged as the subject of this extensive conservation initiative because of its highly specialised environmental needs. Occurring only in damp peatland habitats across northern regions of Britain, Ireland, and a handful of isolated Welsh and English locations, the species is completely reliant on a sole food plant: hare’s-tail cottongrass, a plant that exists only in peat bogs. This extreme specialisation makes the large heath an perfect ecological indicator—where the butterfly flourishes, the peatland environment is functioning well, and carbon storage remains secure.
Georgina Paul believes that by instructing citizen participants to perform basic weekly butterfly surveys along established pathways, Butterfly Conservation can collect crucial data on bog ecosystem health without requiring technical expertise. The approach converts volunteers into conservation observers, making conservation science more accessible across Wales’s wetlands. Should the large heath demonstrate itself to be a reliable indicator, the project could substantially alter how landowners and conservation bodies tackle peatland conservation, offering tangible proof of conservation gains or losses that informs upcoming conservation approaches.
- Large heath caterpillars eat solely hare’s-tail cottongrass plants
- Species numbers fell sharply during the twentieth century
- Now classified as threatened in England and Wales
- Restricted to wet habitats in the north of Britain
Tracking Development Across Welsh Wetlands
Georgina Paul’s two-year research project, currently midway into its timeline through May 2027, covers an ambitious geographical scope that extends throughout Wales’s most significant peatland reserves. Her research group has been systematically monitoring heath butterfly numbers since the start of the initiative last year, conducting regular weekly assessments along established pathways to collect reliable, standardised information. This systematic method enables researchers to identify patterns in butterfly abundance that directly reflect the state of peatlands, creating a longitudinal record of how these delicate habitats react to restoration efforts and ecological stresses. The vast scope of the undertaking—spanning hundreds of square kilometres of protected habitat—represents one of the most comprehensive butterfly monitoring initiatives Wales has conducted in the past decade.
The research team is particularly interested in pinpointing tangible progress at sites where conservation efforts has already started, seeking tangible evidence that conservation interventions are delivering benefits for both the large heath butterfly and the broader peatland ecosystem. Beyond standard population monitoring, the project is advancing novel technological solutions, trialling drones to survey wetland areas and quickly locate key plant species. This integration of volunteer-led fieldwork and cutting-edge aerial surveying creates a solid surveillance structure that can monitor ecological shifts with remarkable detail, ultimately furnishing land managers and environmental organisations with the evidence needed to make evidence-based decisions.
Key Investigation Sites and Geographic Scope
- Cors Caron near Tregaron in Ceredigion, a substantial peatland reserve
- Afon Eden in Gwynedd, protecting extensive heath communities in north Wales
- The Berwyn Range in north-east Wales, encompassing diverse habitat varieties
- Fenn’s, Whixall and Bettisfield Mosses NNR near Wrexham
- All designated reserves where large heath butterflies are now present
Why Peatland Health Is Globally Important
Peatlands form one of Earth’s most critical carbon sequestration mechanisms, yet their significance remains underestimated in broader climate conversations. These waterlogged ecosystems build up partially decomposed plant material over millennia, trapping vast quantities of carbon that would otherwise contribute to atmospheric greenhouse gases. When peatlands continue undisturbed, they function as highly effective carbon sinks, capturing carbon at rates far surpassing most other terrestrial habitats. However, this delicate balance is increasingly at risk from rising global temperatures, which desiccate peat bogs and trigger the release of stored carbon into the atmosphere, creating a vicious cycle that accelerates climate change.
The deterioration of peatlands has far-reaching consequences that extend far beyond carbon emissions. Damaged peat bogs lose their capacity to support specialised wildlife, including rare plants like carnivorous sundews and emperor moths alongside the large heath butterfly. Furthermore, healthy peatlands provide essential ecosystem services including water filtration, flood regulation, and nutrient recycling that support human communities downstream. By tracking large heath populations as a barometer for peatland condition, conservationists can identify degradation early and introduce restoration measures before irreversible damage occurs. This forward-thinking strategy transforms butterfly counts into a practical tool for safeguarding both biodiversity and climate resilience.
| Peatland Benefit | Environmental Impact |
|---|---|
| Carbon Storage | Stores more carbon per hectare than forests; wet peatlands prevent greenhouse gas release |
| Biodiversity Support | Provides habitat for specialised species including endangered butterflies and carnivorous plants |
| Water Management | Filters water naturally and regulates flood risk through water absorption and gradual release |
| Climate Regulation | Contributes to global climate stability by maintaining carbon sequestration rates |
Conservation Work and Future Prospects
Georgina Paul’s two-year study, supported by £249,000 from Welsh government sources, is deliberately concentrated on sites where restoration work has already commenced. By concentrating efforts on these locations, researchers can assess if ongoing intervention delivers tangible improvements for large heath butterfly populations. The project encompasses all designated peatland sites where the butterfly is found, including Cors Caron near Tregaron in Ceredigion, Afon Eden in Gwynedd, the Berwyn Range in north-east Wales, and the Fenn’s, Whixall and Bettisfield Mosses National Nature Reserve near the Wrexham-Shropshire border. This broad geographical strategy ensures that findings capture varied restoration methods across Wales’s peatland network.
The research extends beyond conventional survey methods, integrating advanced technological solutions to accelerate conservation efforts. Drones are undergoing testing to chart peatland ecosystems and locate key plant species, particularly hare’s-tail cottongrass, which forms the sole food source for large heath caterpillars. This technological innovation has the potential to streamline habitat assessment and enable conservationists to respond more rapidly to environmental changes. If the study successfully demonstrates that large heath butterflies serve as dependable markers of peatland health, the results may transform monitoring practices across the UK and provide landowners with actionable, research-informed advice for responsible peatland stewardship.
Volunteer-Led Monitoring and Innovation
Central to the project’s effectiveness is the engagement and development of volunteers who perform weekly walks along established pathways, systematically counting species numbers throughout the summer months. This community-led initiative opens up environmental science, empowering members of the public to make valuable contributions in habitat surveillance. Georgina emphasises that volunteers need not possess specialist knowledge to produce crucial information; their regular monitoring create a comprehensive database for tracking peatland condition across seasons. By empowering local communities to participate directly in conservation, the project strengthens community involvement whilst collecting data required to shape future peatland protection strategies.
