Invasive Non-Native Species


Invasive plantsThe UK is host to a wide range of non-native invasive flora and fauna, many of which cause considerable costs to landowners, developers and utilities operators.


Existing legislation, such as the Wildlife and Countryside Act, exists to control the distribution and release of such species. In Scotland and Ireland, the potential economic costs and ecological impacts of invasive non-native species have recently led to further tightening of controls. Across Europe, threats are becoming ever more apparent, and an Invasive Alien Species Directive is currently in the pipeline.


Contacting us in the early stages of your project may help greatly reduce the chance of unexpected delays or costs at a later date.


Invasive flora

Invasive signal crayfishWhilst it is not an offence to simply have such plants growing within the boundaries of your property; activities such as removal of materials from construction sites, undertaking river bank or in-channel works, or the stocking of commercial or recreational fisheries may facilitate the movement of invasive plants and constitute and offence.


We are capable of providing a combination of desk and field based terrestrial and aquatic surveys, determining the presence and status of non-native invasive plants. In addition, we can determine the level of risk posed, and provide practical advice on how best to address the problem.


Invasive fauna

Invasive non-native fauna have the potential to inflict serious economic and environmental damage, affecting business, ecology and recreation. We have extensive expertise in the survey of invasive aquatic species including American signal crayfish (P. leniusculus) and Killer shrimp (D. villiosus); both of which are highly detrimental to freshwater fisheries.


Our precautionary approach to biosecurity reflects Environment Agency, Natural England and Defra guidance, and we have the capability to provide technical on-site guidance during development projects where non-native invasive’s are present. Please contact us with any queries regarding the necessity or details of invasive species surveys and management.