Otters are relatively common throughout Ireland, and can be found in most coastal areas, lakes and rivers. During the day they live in underground burrows called holts, which are usually on river banks, in woodland or occasionally under walls or rock gabions. They are protected by European and national legislation, under which it is an offence to:
- Kill or injure an otter
- Disturb them during breeding or hibernation
- Damage a breeding or resting site (known as ‘holts’ and ‘couches’)
If a development is likely to affect potential otter habitat, a planning authority may request an otter survey and report from a suitably qualified ecologist. In particular, the following activities are considered high-risk:
- Flood protection works along river banks or in coastal areas
- Works involving the removal of trees or woodland near watercourses
- Bridging or culverting of watercourses
- Discharging surface water or waste water into rivers or lakes
- Linear infrastructure projects (e.g. roads) in areas likely to be used by otters
Otter surveys - what is involved?
All riverbanks and seashore in the vicinity of the site will be searched for holts, couches and any other evidence of otters (feeding signs, droppings or entry/exit points from rivers). Otter surveys can be conducted throughout the year, but are most effective following a period of prolonged dry weather.
If evidence of otters is found on a development site, mitigation measures may be required to avoid killing / injuring otters during works, to avoid disturbance of breeding / resting places, and to protect their feeding habitat. Suitable measures will be designed on a case-by-case basis in consultation with the project architect or engineer.
If you require an otter survey please contact us for a quote or further advice.
