Report your sightings of squirrels and pine martens in Northern Ireland 

Led by researchers from the University of Galway, Ulster Wildlife, and the Vincent Wildlife Trust, the survey aims to map the latest distribution of red and grey squirrels, as well as the pine marten, across the island of Ireland. 

Members of the public are invited to record their sightings of the three species throughout 2026, helping researchers build a detailed picture of how their populations are changing. 

The 2026 survey is being delivered with the support of the National Biodiversity Data Centre in the Republic of Ireland and CEDaR in Northern Ireland. 

Sightings of all three mammals can be recorded on the online survey forms hosted on their websites www.biodiversityireland.ie and https://www2.habitas.org.uk/records/uw-squirrel-monitoring

The survey is part of a long-running monitoring programme, with previous surveys carried out on four occasions since 1997, providing vital insights into long-term trends and conservation success.

Ulster Wildlife has been monitoring these three species for over a decade in Northern Ireland and is delighted to partner once again with the University of Galway to complete the picture on how these species are faring across Ireland

For many years, the future of the red squirrel looked bleak. However, recent surveys have revealed a remarkable and unexpected turnaround, with the grey squirrel being knocked back in certain areas, and the reds showing signs of recovery. In several regions, grey squirrel numbers have declined sharply, while red squirrels are showing encouraging signs of recovery. 

Research linked this shift to the successful comeback of another native species, the pine marten, a tree-dwelling carnivore and one of the few predators that can successfully hunt grey squirrels. Because the red squirrel evolved alongside pine martens, they are better adapted to avoiding them and can escape danger more easily.

Dr Colin Lawton of the University of Galway’s School of Natural Sciences explained the significance of the new survey: “In our most recent survey in 2019, we found that the grey squirrel had all but disappeared from 10 midland counties, and the red squirrel and pine marten were doing particularly well.

“However, the dynamics between the three species are finely balanced, and we need to continue to monitor the animals to make sure things don’t change again. The greys continue to spread in the south and northwest, and they are doing particularly well in urban areas, where pine martens are very rare.”

Katy Bell, Senior Conservation Officer at Ulster Wildlife, said: “Ulster Wildlife has been monitoring these three species for over a decade in Northern Ireland and is delighted to partner once again with the University of Galway to complete the picture on how these species are faring across Ireland. This data will be invaluable to the conservation work for red squirrel and pine marten in Ireland.” 

Dr Lawton added: “During our last survey, we received an incredible 3,407 records of the three species from the public. This fantastic wealth of information plays a crucial role in protecting our native biodiversity. We are once again asking our Citizen Scientists to share their sightings, upload photographs and help us understand where these animals are living and how they are faring.”

Report your sightings of squirrels and pine martens in Northern Ireland