Level


                                         Invasive species


                                    Native habitat of invaders

                                 New habitat of introduced species

                                 How have invasive species spread

                                         Original species

                                                 1






                                                 2
















                                                 3































                                               Level


                                         Invasive species


                                    Native habitat of invaders

                                 New habitat of introduced species

                                 How have invasive species spread

                                         Original species




                                                 4