The Shakespeare Fan Who Unleashed 200 Million Starlings

On a March morning in 1890, a wealthy New Yorker named Eugene Schieffelin stood in Central Park and opened a cage. Out fluttered a few dozen European starlings, their iridescent feathers catching the spring light. Schieffelin, a pharmaceutical manufacturer and devoted Shakespeare enthusiast, had a singular, peculiar goal: he wanted to introduce to North America every bird species ever mentioned in the Bard's plays. The starling, cited once in Henry IV, Part 1, made the list.

He released about 60 birds that day, and another 40 the following year. No permits were required. No ecological assessments were conducted. The prevailing attitude of the era held that adding familiar European species to the American landscape was an act of enrichment, not risk. Within a few decades, those 100 birds had multiplied into millions. By the 1940s, they had reached the Pacific coast. Today, the North American population exceeds 200 million, making the European starling one of the most abundant and destructive invasive birds on the continent.

A Literary Obsession Takes Flight

Schieffelin belonged to the American Acclimatization Society, a group of well-to-do amateurs who believed that the New World would be improved by the flora and fauna of the Old. Their efforts were part of a broader 19th-century trend: acclimatization societies formed in cities across the British Empire and the United States, deliberately importing species ranging from skylarks to salmon. The starling was not Schieffelin's first attempt; he had previously released nightingales and skylarks, but those species failed to establish. The starling, however, possessed a ruthless adaptability.

Native to Europe and western Asia, Sturnus vulgaris thrives in open country, farmland, and urban margins. It is an omnivore, eating insects, fruit, grain, and garbage. It nests in cavities — tree hollows, building crevices, nest boxes — and it defends those cavities with violent tenacity. In Central Park, the starlings found a landscape perfectly suited to their needs: abundant food, plentiful nesting sites in the city's aging architecture, and no natural predators equipped to suppress their numbers.

The Cascade Begins

The starling's spread across North America was not a slow creep but a demographic explosion. The birds moved west along the corridors of human settlement, following rail lines, farmsteads, and suburban sprawl. Wherever people altered the land, starlings followed. By 1928, they had reached the Mississippi River. By 1942, they were in California. The speed of the expansion stunned ornithologists, who had assumed that a species with such a northerly native range would struggle in the southern heat. Instead, the starling proved tolerant of climates from Alaska to Mexico.

The ecological consequences were immediate and severe. Starlings are cavity nesters, and they compete directly with native species that rely on the same limited resource: bluebirds, woodpeckers, flickers, tree swallows, and purple martins. A starling will not wait for an empty hole. It will evict an occupying pair, puncture their eggs, kill their nestlings, and claim the site for itself. Studies in the mid-20th century documented starlings usurping up to half of all available cavities in some woodlots, driving measurable declines in native bird populations.

A Billion-Dollar Nuisance

The damage extended well beyond songbirds. Starlings gather in immense winter roosts, sometimes numbering in the hundreds of thousands. Their droppings accumulate beneath these roosts, killing vegetation, corroding structures, and fostering the fungus that causes histoplasmosis, a respiratory disease in humans. In agricultural regions, flocks descend on feedlots, grain silos, and fruit orchards. A 2000 study estimated that starlings cause over $800 million in annual agricultural damage in the United States alone, consuming and contaminating cattle feed, damaging grapes, cherries, and blueberries, and fouling water supplies.

At airports, they pose a collision hazard. In 1960, a Lockheed Electra departing Boston's Logan Airport struck a flock of starlings on takeoff, lost power in three engines, and crashed into Winthrop Bay, killing 62 people. It remains the deadliest bird-strike accident in aviation history.

Lessons Unlearned

The starling's conquest of a continent was not an isolated blunder. In 1859, an English settler named Thomas Austin released 24 wild rabbits on his Victorian estate for sport hunting; within 50 years, they had spread across Australia, causing catastrophic erosion and agricultural losses. In the 1880s, mongooses were introduced to Caribbean and Pacific islands to control rats in sugar cane fields; the mongooses ignored the nocturnal rats and instead decimated ground-nesting birds and reptiles. In the 1930s, Australia imported cane toads to eat beetles in sugar cane; the toads couldn't reach the beetles but poisoned the native predators that tried to eat them.

Each of these introductions was sanctioned, even encouraged, by authorities who mistook biological novelty for improvement. The starling stands out only because its sponsor left a paper trail — a Shakespeare quotation and a Central Park benchmark — that makes the absurdity unmistakable. Schieffelin died in 1906, never knowing that his literary tribute would become an ecological disaster.

Today, the starling is a permanent fixture of the North American avifauna. Eradication is impossible. The best that managers can do is local suppression: trapping at feedlots, deterrents at airports, nest-box modifications that exclude starlings but admit bluebirds. The bird that Schieffelin released to honor a playwright has rewritten the ecology of a continent in ways no sonnet could explain. The 100 birds that lifted from a Manhattan park on a spring morning in 1890 are still spreading, still competing, still multiplying — a living monument to the danger of good intentions untethered from ecological knowledge.

This is one episode in a much longer story. For the full account of invasive species history, read “Silent Invasion: How Invasive Species Are Reshaping Our World” by Joe Hayes on MixCache.com.