Otters are a fully protected species in the UK, and their presence must be carefully considered where development may affect rivers, streams, wetlands, or other aquatic habitats. EcoVigour delivers comprehensive otter surveys to support planning applications, impact assessment, and mitigation design.
Why are otter surveys required?
Otter surveys are typically required where development is proposed near watercourses or suitable riparian habitats. They help to:
- Ensure compliance with the Wildlife and Countryside Act 1981 and Habitats Regulations
- Provide evidence to support planning applications
- Identify potential impacts on otter resting sites (holts) and territories
- Inform appropriate mitigation and, where necessary, licensing
Survey methods
Our surveys are undertaken in line with recognised guidance, including CIEEM best practice guidelines, Natural England standing advice, and The Mammal Society’s guidance on surveying for watercourse mammals. A combination of the following methods may be used:
- Habitat Assessment
Evaluation of watercourses and surrounding habitats to determine suitability for otters, including availability of shelter, food resources, and connectivity. - Field Sign Surveys
Systematic searches for evidence such as spraints (droppings), footprints, slides, couches, and holts along watercourses and banks. - Holts and Resting Site Identification and assessment of potential and confirmed holts, couches, and other resting places that may be affected by development.
- Camera Trapping (where appropriate)
Deployment of remote cameras to confirm presence, activity patterns, and site usage, particularly where field signs are inconclusive.
Survey methodology and seasonal constraints
Otter surveys can be undertaken throughout the year; however, survey conditions can influence effectiveness:
- Optimal survey periods are typically during spring and autumn, when vegetation is less dense and field signs are more visible.
- Winter surveys can be effective due to reduced vegetation cover, although high water levels may obscure evidence.
- Summer surveys may be more challenging due to dense vegetation and lower detectability of field signs.
Survey design is tailored to site conditions and project requirements to ensure robust and reliable results.
Our approach
- Surveys undertaken by experienced ecologists in line with current guidance
- Careful consideration of potential impacts on holts and resting sites
- Clear, concise reporting to support planning and licensing
- Practical, proportionate mitigation strategies aligned with your project programme
