European starlings have a way of appearing in unexpected places

European starlings have a way of appearing in unexpected places — the United States, for example, where they are not native but owe their origin to a brief reference in Shakespeare’s “Henry IV, Part 1.” In 1890, a drug manufacturer who wanted every bird found in Shakespeare to live in America released 60 starlings in Central Park. After spending a few years nesting modestly under the eaves of the American Museum of Natural History, they went from a poetic fancy to a menacing majority; there are now upward of 200 million birds across North America, where they thrive at the expense of other cavity nesters like bluebirds and woodpeckers, eat an abundance of grain — as well as harmful insects — and occasionally bring down airplanes.