BirdAnalyst
Species · Indiana · BBS 2026 Release · 1966–2025

Dickcissel Population Trend in Indiana

All statesGrassland birds

Dickcissel in Indiana has fallen sharply: down 59% on the route-weighted index since 1968.

-59%Since 1968TrendPercent 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 →
66Routes 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 →
59YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Dickcissel Trends in IndianaNotable 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 declinecomputed 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 →

Dickcissel has fallen sharply in Indiana: down 59% on the route-weighted index since 1968.

Dickcissel Population Forecast in Indiana

If the recent trend holds, Dickcissel in Indiana is projected to stay roughly flat through 2030, near 7.7 (95% range 0.97–14). A 5-year backtest shows a typical error of ±26.4%, with 100% of held-out values landing inside the 95% band.

+2%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 →
7.7Projected 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 →
0.97–1495% 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 →
±26.4%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, Dickcissel in Indiana is projected to stay roughly flat through 2030, near 7.7 (95% range 0.97–14). A 5-year backtest shows a typical error of ±26.4%, with 100% of held-out values landing inside the 95% band.19662030
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 →
20267.50.7814
20277.50.8214
20287.60.8714
20297.60.9214
20307.70.9714

Dickcissel Survey Routes in Indiana

Routes recording Dickcissel in Indiana.
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 →
Newberry5320251999
Kankakee Sands4020252000
Cuba2520252017
W Lafayette2020251981
Fowler1920251966
Washington1920251987
Shelbyville1820251983
Wallace1820231999
Cyprss1620251999
Jamestown1420251986
Brazil1320251966
Witts Station1320252000
Thorntown1220251987
New Brunswick1120252024
Lagrange1120251999
Hebron1020221966
Cumback1020251966
Millersburg1020241981
Spencer820221967
Monticello620251981
Laporte620242000
Lakeville620232000
South Bend519741966
Packertown520041967
Ellis520221966

Dickcissel Population Trend in Other States

alabamaarkansascoloradodelawaregeorgiaillinoisiowakansaskentuckylouisianamarylandmichiganminnesotamississippimissourimontananebraskanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniasouth-carolinasouth-dakotatennesseetexasvirginiawest-virginiawisconsinwyoming

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