Starling

Shakespeare’s accidental contribution

The introduction of starlings to North America has a strange origin:

• 1890: Eugene Schieffelin released 60 European starlings in Central Park, NYC
• Schieffelin reportedly wanted all birds mentioned in Shakespeare’s works to live in America
• Starling appears in Henry IV, Part 1
• Released population spread rapidly across continent
• Now estimated 200+ million starlings in North America

This single introduction event transformed starlings into one of the most successful and problematic invasive species in American history.

Shakespearean reference

The Shakespeare reference Schieffelin acted upon:

Hotspur: “Nay, I’ll have a starling shall be taught to speak nothing but ‘Mortimer,’ and give it him to keep his anger still in motion.”
— Henry IV, Part 1, Act 1, Scene 3

The single brief mention prompted Schieffelin’s release campaign. Whether he was motivated entirely by Shakespeare or by other factors (Victorian acclimatization society membership, general interest in introductions) is debated, but the literary connection has cemented the story.

Murmuration spectacle

Starlings perform spectacular flock displays called murmurations:

• Massive coordinated movements of thousands or millions of birds
• Complex patterns flowing through sky
• Each bird responds to seven nearest neighbors
• Self-organized without central leadership
• Mathematical models can predict flock behavior
• Famous viewing sites: Rome, parts of UK, Israel

Murmurations are among the most stunning natural phenomena — emergent complex behavior arising from simple individual rules. They’ve been studied by mathematicians, physicists, and biologists.

Vocal mimicry

Starlings are excellent vocal mimics:

• Imitate other birds routinely
• Copy mechanical sounds (car alarms, phone rings)
• Some can imitate human speech
• Repertoire grows throughout life
• Use mimicry in communication and territorial display

Wolfgang Amadeus Mozart famously owned a pet starling that learned parts of his music — when the bird died in 1787, he held a formal funeral and wrote a poem in its honor.

Cavity nesting issues

Starlings are aggressive cavity nesters:

• Compete with native species for nesting sites
• Aggressive eviction of other species
• Successful in many cavity types
• Major problem for: bluebirds, woodpeckers, flickers, kestrels
• Conservation concern for cavity-nesting natives

The cavity competition is a major reason starlings are considered invasive — they’ve contributed significantly to declines of several native cavity-nesting species in North America.

Iridescent plumage

Starlings have distinctive iridescent plumage:

• Black appearing at first glance
• Iridescent purple, green, and blue in good light
• White spots in winter (shed by spring)
• Yellow bill during breeding season (dark in winter)
• Beautiful when properly observed

The iridescence comes from microscopic feather structure — light-scattering rather than pigment. The same physical principle creates iridescent colors in many other species.

Agricultural pest

Starlings are major agricultural pests in many regions:

• Damage cherry, blueberry, grape crops
• Eat livestock feed in feedlots
• Contaminate water supplies with droppings
• Disease transmission between farms
• Estimated billions in US damage annually

Various control methods are used including bird scarers, netting, and lethal control — though starling populations remain massive despite long-term control efforts.

Population stability

Despite intensive control efforts, starling populations remain enormous:

• North American population: 100-200+ million
• European population: stable to slightly declining
• Australian population: very large
• Global success in introduced ranges
• Resilient to human pressures

The species’ adaptability and reproductive rate make complete eradication essentially impossible at large scales.

Native population decline

Ironically, European starlings are declining in their native range:

• UK population: declined ~50% since 1970s
• Continental Europe: significant declines
• Causes uncertain: agricultural intensification, pesticides, habitat loss
• Threatened or near-threatened in some regions
• Conservation concern in native range

The contrast — invasive in North America, declining in Europe — illustrates how species can have very different conservation statuses in different parts of their range.

Cooperative roosting

Starlings form massive evening roosts:

• Tens of thousands of birds at single sites
• Loud collective vocalizations
• Concentrated droppings damage trees at favored sites
• Roost sites used for years or decades
• Predators sometimes attack roosts

The roost size creates public nuisance issues — accumulated droppings, noise, and tree damage can be substantial at major roost sites.

Disease vector

Starlings can transmit various diseases:

• Fungal infections (histoplasmosis from accumulated droppings)
• Salmonella transmission to livestock
• TGE virus in pigs
• Various bacterial infections

These public health concerns add to the management challenges posed by large urban and rural starling populations.

Cultural representations

Starlings appear in various cultural contexts:

• Mozart’s pet starling — historical curiosity
• Various poetry featuring starlings
• Modern photography of murmurations widely shared
• Children’s books featuring starlings
• Literary references including Mary Oliver poems

The cultural recognition is divided — admiration for murmurations and mimicry contrasts with frustration over invasive impacts.

Modern research

Starlings remain important research subjects:

• Vocal learning research (relevant to human language development)
• Flocking behavior models (applied to crowd dynamics, swarm robotics)
• Invasion biology (understanding species spread)
• Bird intelligence studies (cognitive abilities)

The species’ abundance and accessibility make them excellent subjects for various biological research questions.