Increasing Calls to Foster Biodiversity in World’s Cities
The portion of the planet characterized as urban is on track to triple from 2000 to 2030—that is, we are already almost halfway there. Meanwhile, 17 percent of the 800 or so North American bird species are in decline, and all 20 species on the Audubon Society’s list of “common birds in decline” have lost at least half their population since 1970.
Those kinds of stark numbers, repeated around the world, have made it disturbingly evident that it’s not enough for cities to plant a million trees, preach the gospel of backyard gardens, or build green roofs and smart streets. The trees, shrubs, and flowers in that ostensibly green infrastructure also need to benefit birds, butterflies, and other animals. They need to provide habitat for breeding, shelter, and food. Where possible, the habitat needs to be arranged in corridors where wildlife can safely travel.
Though it may be too soon to call it an urban wildlife movement, initiatives focused on urban biodiversity seem to be catching on.
Read more in Yale’s e360