Invasive non-native species are those plants and animals that do not naturally occur in the River Thames but flourish in the absence of natural predators. If unmanaged, their populations can increase very quickly, posing a threat to our native species and to infrastructure (such as sea walls). Volunteers are being trained in how to identify and record a select number of invasive non-native species along the Thames (see the Map Legend below), which will help inform decisions about managing their populations. The map shows where volunteers have already recorded the presence of these species along the Thames. Back to Thames River Watch
Using the maps: Hover the mouse on a point or view the full survey by clicking on a data point. A colour-coded key is below the map.