Clara Bog lies a few miles west of the town of Clara in County Offaly, a low dome of peat thirteen square kilometres in extent. Seen from the small wooden boardwalk that the National Parks and Wildlife Service installed in 2003, it looks like nothing much. A rust-coloured plain. Some bog cotton. A distant line of birch.
Pat Gallagher, who has worked on Clara for twenty-one years, finds this reaction familiar and forgivable. A bog, he says, gives up its secrets slowly or not at all.
Gallagher is sixty-three, a former turf cutter from Ballycumber, and now the senior conservation ranger for the Clara Bog Special Area of Conservation. He wears the same fleece in all seasons. He is followed everywhere by a black collie named Mossie.
The bog beneath his boots began forming around eight thousand years ago, in a shallow lake left by the retreating ice. Reeds and sedges grew in the lake margins. They died and did not fully decompose. The waterlogged conditions starved the decomposers of oxygen. The dead plants accumulated.
Over millennia, sphagnum mosses moved in. Sphagnum is the architect of raised bogs. It holds twenty times its own weight in water, acidifies its surroundings, and slowly lifts itself above the surrounding water table on a cushion of its own dead ancestors.
By the time the Normans arrived in Ireland, the dome of Clara stood several metres higher than the fields around it.
Then came the drainage. From the late eighteenth century onwards, Irish bogs were cut for fuel at increasing industrial scale. The state company Bord na Mona was founded in 1946 and stripped huge tracts of midland bog for electricity generation. Clara escaped the worst of this only because its margins were privately owned and worked by small turf cutters with slanes and barrows.
But cutting still happened. Drains were dug. The water table fell. The sphagnum began to die back.
By the 1980s, when the Dutch ecologist Matthijs Schouten persuaded the Irish government that Clara was one of the last great raised bogs in western Europe, a third of its surface had been damaged.
The restoration began in earnest after 2003, with funding from the European Union LIFE programme. Gallagher was hired the same year.
The principle was simple and the work was hard. Block the drains. Let the water rise. Wait.
Over two decades Gallagher and a rotating team of four to six men have installed more than nine thousand peat dams. Each is a small wedge of bog material packed into a drain by hand, then left to settle. The dams hold back water that previously rushed off the dome into the surrounding farmland.
The water table has risen, on average, by 27 centimetres across the restored areas. In the wettest sections the bog now flushes and bounces underfoot like a held breath.
Dr. Catherine Farrell, an ecologist with the Irish Peatland Conservation Council who has monitored Clara since 2008, calls the response one of the most encouraging she has seen in Europe.
Sphagnum cover has increased from a baseline of 31 percent in 2008 to 64 percent in 2025. Round-leaved sundew, Drosera rotundifolia, has recolonised stretches where it had not been recorded for fifty years. The carnivorous plant is small, no bigger than a coin, but its red glandular hairs glitter in the morning light along the boardwalk.
Curlew, which had vanished from the bog as breeding birds by 2012, returned in 2021. Three pairs were recorded last spring. Gallagher heard the first calling male himself, at 4:17 on a morning in late April, and walked back to the office without telling anyone for a full day.
Climate accounting has complicated the work. Intact peatlands are among the most efficient carbon stores on earth. Damaged peatlands are among the worst sources. A dry, cut-over bog emits carbon dioxide continuously as the exposed peat oxidises. A rewetted bog locks it up again.
A monitoring station installed at Clara in 2019 by a team from Trinity College Dublin, led by the biogeochemist Dr. Florence Renou-Wilson, measured the bog flipping from net source to net sink in 2023.
Gallagher is wary of the language of carbon credits. He has seen good bogs reduced to columns in spreadsheets and he distrusts the trend. What the bog does for the climate, he says, is real. But it is not why he comes here.
Why he comes here is harder to say. He gestures at Mossie, at the cotton grass, at the wide grey sky.
His father cut turf on a neighbouring bog all his working life. The smell of a turf fire is still, to Gallagher, the smell of home. He does not see a contradiction in this. The bog, he says, asked nothing of his father and asks nothing of him. It only asks not to be drained.
On the walk back to the car park a snipe explodes from a tussock and zigzags off across the dome. Gallagher does not flinch.
The boardwalk creaks. Mossie pads ahead. The bog breathes.
