Some species are endangered due to the invasion of non-native wildlife in the area. The spread of invasive species has greatly impacted native wildlife populations all over the world. Native species have to compete with the invasive species for both habitat and food.
To help native wildlife, you can do things in your garden to attract native insects like bees and butterflies that help to pollinate native plants in your area. Visit the National Wildlife Service web site to learn more about what native plants you can focus on in your area.