, backyard Wildlife ecologists at
Ohio State University studied coyotes living in Chicago over a seven-year period (2000–2007) and found that coyotes have adapted well to living in densely populated urban environments while avoiding contact with humans. They found that urban coyotes tend to live longer than their rural counterparts, kill rodents and small pets, and live anywhere from parks to industrial areas. The researchers estimated that there are up to 2,000 coyotes living in the Chicago metropolitan area and that this circumstance may well apply to many other urban areas in North America. In Washington, D.C.'s
Rock Creek Park, coyotes den and raise their young, scavenge
roadkill, and hunt rodents. "I don't see it as a bad thing for a park," the assigned
National Park Service biologist told a reporter for
Smithsonian Magazine. "I see it as good for keeping animal populations in control, like the squirrels and the mice." Unlike rural coyotes, urban ones have a longer lifespan and tend to live in higher densities but rarely
attack humans and can be frightened away by arm waving or loud noises. The animals generally are
nocturnal and prey upon rabbits, rats, Canada geese, fruit, insects and family pets, especially small
dogs and domestic
cats. Analysis of urban coyote scat found that the most common food source of Southern California coyotes came from anthropogenic sources, namely edible plantings cultivated by humans (particularly figs, palm fruit and grapes), litter/refuse, and domestic cats. They also consumed gophers, ground squirrels (but rarely rats or mice), rabbits and birds. Meanwhile, the diet of suburban coyotes included a much higher proportion of native mammals, primarily rabbits.
Urbanization also leads to reduced
gene flow between adjacent populations. One study in
Tucson, Arizona found that urban coyotes had similar antibodies and pathogens to coyotes in general, and had a survival rate in the city of 72% for any given year, on average. A study in 2007 suggested that coyotes were "successful in adjusting to an urbanized landscape" with high survival rates, and are frequently in "close proximity" to people. Both studies suggested that a major cause of deaths of urban coyotes was collisions with motorized vehicles. == Species interactions and human conflict ==