The Geological Survey Ireland (GSI) is warning horse owners that they will be conducting an aerial Tellus survey in Mayo and Donegal at low levels which may startle horses.

An aircraft will fly at a low level of around 60m over rural areas collecting geological information and rise to 240m over urban areas. The sound of the plane is similar to that of a passing lorry and this may startle sensitive livestock including horses.

The plane will be in the air from March 2017 and an updated flight schedule is published on their website, www.tellus.ie, each week.

The latest phase of the survey will also involve ground sampling teams collecting soil and stream samples across counties Galway, Roscommon and parts of the Midlands from May.

For further information, please visit www.tellus.ie