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Species · Illinois · BBS 2026 Release · 1966–2025

Eurasian Collared-Dove Population Trend in Illinois

All statesGeneralists

Eurasian Collared-Dove in Illinois has surged: up 38× on the route-weighted index since 2003.

38×Since 2003TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
90Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
24YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Eurasian Collared-Dove Trends in IllinoisNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Eurasian Collared-Dove has surged in Illinois: up 38× on the route-weighted index since 2003.

Eurasian Collared-Dove Population Forecast in Illinois

If the recent trend holds, Eurasian Collared-Dove in Illinois is projected to rise about 32% by 2030 — from 3.1 in 2025 to a central estimate of 4.1 (95% range 3.4–4.7). A 5-year backtest shows a typical error of ±26.9%, with 20% of held-out values landing inside the 95% band.

+32%Change by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
4.1Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
3.4–4.795% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±26.9%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Eurasian Collared-Dove in Illinois is projected to rise about 32% by 2030 — from 3.1 in 2025 to a central estimate of 4.1 (95% range 3.4–4.7). A 5-year backtest shows a typical error of ±26.9%, with 20% of held-out values landing inside the 95% band.20012030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20263.52.94.2
20273.73.04.3
20283.83.14.5
20293.93.34.6
20304.13.44.7

Eurasian Collared-Dove Survey Routes in Illinois

Routes recording Eurasian Collared-Dove in Illinois.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Rosamond1620252003
Holcomb1120252015
Cave In Rock1120182018
Pontiac1020252005
Humboldt1020252014
Beaucoup1020252003
Sterling1020232012
Stillwell920252002
Bartonville920252005
St Morgan920222010
Buda820232012
Fairbury820252005
Cameron720252012
Clarksdale720232010
Caledonia720252015
Atkinson620242007
Geneseo620252017
Newark620222012
Deer Creek620242006
Pawnee620252017
Shannon620252015
Gridley620252014
Terre Haute520252008
Williamsfld520252010
Minonk520242012

Eurasian Collared-Dove Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradofloridageorgiaidahoindianaiowakansaskentuckylouisianamarylandmichiganminnesotamississippimissourimontananebraskanevadanew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvirginiawashingtonwisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.