From an email:
The District Department of the Environment and Audubon MD/DC is holding a backyard wildlife habitat workshop at Columbia Heights Recreation Center on Saturday July 23 from 1-4pm.
The workshop will consist of an hour of slideshow presentations on creating wildlife habitat and gardening with native plants, after which we will plant a garden with locally native plants. Participants will receive a book (“Bringing Nature Home” by Douglas Tallamy), a birdhouse kit and live plants to bring home. The workshop is free and open to the public. Register online here (click on “Backyard Habitat Education”).