Environmental Management System
Protected Species Surveys
Habitat Surveys
Habitat Creation and Management
Licensing and Mitigation
Expert Witness

The white clawed crayfish is protected under Schedule 5 of the Wildlife & Countryside Act 1981 (as amended).
It is an offence to intentionally take white-clawed crayfish from the wild. It is also an offence to sell these crayfish.

Crayfish Survey

White clawed crayfish are found in a range of aquatic habitats, such as lakes, rivers, streams or quarry pools. Crayfish prefer unpolluted, calcareous waters with little sediment and plenty of shelter in the form of rocks, aquatic plants and tree roots.

Habitat assessment can be undertaken at any time of year. Full surveys can only take place from mid-July to the end of September.This is to ensure that females are not disturbed while carrying their eggs. The main survey technique used is active searching in suitable habitat, though this method is only suitable during times of base flow. Night searching by torch is an effective method in addition to trapping. Trapping is a more suitable option in deep pools or where active searches cannot be effectively conducted.

Case Studies

Phase 1 Habitat Survey in Winchester

November 2011
UES recently completed an Extended Phase 1 Habitat Survey of an old mill in Winchester. An Extended Phase 1 Habitat Survey involves mapping the habitats on the ... more...

Extended phase 1 habitat survey in Deeside

August 2011
UES have completed an extended phase 1 habitat survey of a site in Deeside, North Wales in order to inform the client of any potential impacts their development... more...

Extended Phase 1 Habitat Survey Flintshire

May 2010
United Environmental Services have completed an Extended Phase 1 Habitat Survey of a site near the town of Flint in North Wales. The site has been a dis-used br... more...

Major Pipeline Survey

January 2010
UES were commissioned by a Northwest based utilities company to carry out survey work for a major pipeline in the north west of England. ##Planning The propo... more...