The Eurasian otter Lutra lutra and its resting places are protected by EU and UK legislation. Consultant ecologists must identify resting sites so they can be protected during developments. Currently, consultants usually use field-signs, but radio-telemetry studies indicate this may be unreliable. Camera-traps could be used to identify resting sites within the consultancy industry. This research aims to improve field-sign and camera-trap survey methods to identify otter resting sites. Firstly, camera-trap methodology is considered. Arrays...