a city provides habitat for birds

Baltimore is providing habitat for birds: http://www.baltimoresun.com/news/maryland/baltimore-city/bs-md-ci-bird-treaty-city-20161002-story.html

"The agreement designates Baltimore an urban bird treaty city, which means the city joins 22 other cities across the country, including cities in Alaska and Hawaii, that have committed to restoring and conserving green space especially for birds. The program, formally known as the Urban Conservation Treaty for Migratory Birds, was launched by the Fish and Wildlife Service..."

Learn more:   https://www.fws.gov/urban/urbanbirdtreaty.php