River Otter, Devon River Otter, Devon The River Otter rises in the Blackdown Hills just inside the county of Somerset, England near Otterford, then flows south for some 32 km through East Devon to the English Channel at the western end of Lyme Bay, part of the Jurassic Coast, a UNESCO World Heritage Site. The Permian and Triassic sandstone aquifer in the Otter Valley is one of Devon's largest groundwater sources, supplying drinking water to 200,000 people. The river's source is north of Otterford, where a stream feeds the Otterhead Lakes: and then through Churchstanton before entering Devon. The river flows through a
East Devon Pebblebed Heaths is mostly Bunter Pebblebeds of Triassic age, though there is some New Red Sandstone and marls of Permian age. Notable breeding bird species that have been recorded on the site include the European nightjar, Eurasian hobby and Dartford warbler. Rare dragonflies include the small red damselfly, the southern damselfly and the downy emerald. Other insects recorded include the bog bush cricket. Annual wildlife surveys are carried with groups such as the Devon Amphibian and Reptile Group (DRAG), the Devon Bat Group, Butterfly Conservation, the Devon Wildlife Trust and the Devon Biodiversity Records Centre helping coordinate the work. East Devon Pebblebed