How invasive non-native species threaten our woods, Woodland Trust
Wildlife and Countryside Act 1981 (act which gives protection to native species)
List of plants which are established in the wild
List of animals which are established in the wild
Wood Wise Invasive Species Spring 2013, Woodland Trust
Get to know common garden "thug" plants which can get quickly out of hand
What's the difference between Spanish bluebells and English bluebells, Plantlife
Wildlife and Countryside Act 1981 (act which gives protection to native species)
List of plants which are established in the wild
List of animals which are established in the wild
Wood Wise Invasive Species Spring 2013, Woodland Trust
Get to know common garden "thug" plants which can get quickly out of hand
What's the difference between Spanish bluebells and English bluebells, Plantlife