Native species of plants were removed from your site when it was initially developed. More may have been displaced by the landscaping decisions of people who owned the property before you. It's time to put them back.
Native plants support native animals. It's that simple. To restore the ecosystem that existed before your house was built, you have to put back the native plant species your local animals need to eat and to build their homes from or in. Plants are the bottom of the food chain.
Because plants can't walk themselves to your location, if they are gone, it's up to you to find them and plant them. This blog is going to be about what's local to Malden, Massachusetts in the United States, but the principles are the same for anywhere. Find out what plant species should be in your space that aren't any more, and put them back.