[header] How to help endangered animals [title] Look for local species that need help. [step] Endangered animals can seem like a far-away problem, but there are likely threatened species, from birds to bears to bugs, in your own neighborhood. [substeps] Invasive plants that overrun native vegetation and invasive animals without existing predators can combine to devastate native animal populations. 
Note the difference between invasive and non-native species; invasive refers specifically to species that thrive and overtake native species. Many non-native plants and animals are just fine.