National Trust coastal discoveries

National Trust Area Ranger and conservation expert, Dr Cliff Henry
National Trust Area Ranger and conservation expert, Dr Cliff Henry

There are thousands of species of wildlife, plant-life and fungi living on the North Coast: burrowed inside leaves, hidden under rocks or lurking amid stalks of grass.

Last year the National Trust, Northern Ireland’s largest conservation charity, gathered over one thousand species records during a ‘BioBlitz’ at White Park Bay, and another thousand records in regular surveys and everyday observations - with some interesting results.

During a survey at White Park Bay, National Trust Area Ranger and conservation expert, Dr Cliff Henry, made an accidental discovery that was more exciting than first suspected.

While photographing interesting lifeforms on the leaves of a primrose, Dr Henry’s attention was drawn to the bulbous formations on a neighbouring meadowsweet plant. The unsightly bumps (or ‘gall’) in the plant tissue were later identified as rough meadowsweet gall – home to a colony of gall fly larvae. The larvae develop from eggs laid on the plant by the tiny female fly which then burrow into the leaves and stem of the plant. Here they benefit from nutrients, and are also protected from predators.

“It was only after trying to identify the gall on meadowsweet that I realised how rare it actually was,” explained Dr Henry. “Not only was it a first for Northern Ireland and Ireland, but also for the entire British Isles. We also learned that it is very rare in Europe with only one record in Denmark in 2015.”

While everyone else may have lamented the wet summer, and were perturbed by the unseasonable warmth of autumn, the conditions were ripe for the gall fly.

“The larvae crawl out of the gall in the autumn and are thought to need waterlogged conditions to make their cocoon before emerging the following year,” said Dr Henry.

Other remarkable recordings by Dr Henry at the Giant’s Causeway include the first NI record of the Pygmy Sorrel moth and several other types of plant gall, including the second Northern Ireland record of a burnet rose gall and the third Northern Ireland record of a Robin’s pin cushion gall.