Within ten years the coyote population exploded, growing by more than 3,000 percent, and infiltrated the entire Chicago area. Gehrt found territorial packs of five to six coyotes, as well as lone individuals, called floaters, living in downtown Chicago. They traveled at night, crossing sidewalks and bridges, trotting along roads and ducking into culverts and underpasses. One pair raised pups in a drainage area between a day care facility and a public pool; a lone female spent the day resting in a tiny marsh near a busy downtown post office.—City Slinkers