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

American Robin Population Trend in Indiana

All statesForest birds

American Robin in Indiana has surged: up 122% on the route-weighted index since 1968.

+122%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 →
69Routes 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 American Robin 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 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 →

American Robin has surged in Indiana: up 122% on the route-weighted index since 1968.

American Robin Population Forecast in Indiana

If the recent trend holds, American Robin in Indiana is projected to rise about 64% by 2030 — from 55 in 2025 to a central estimate of 89 (95% range 63–116). A 5-year backtest shows a typical error of ±62.6%, with 0% of held-out values landing inside the 95% band.

+64%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 →
89Projected 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 →
63–11695% 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 →
±62.6%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, American Robin in Indiana is projected to rise about 64% by 2030 — from 55 in 2025 to a central estimate of 89 (95% range 63–116). A 5-year backtest shows a typical error of ±62.6%, with 0% 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 →
20268660113
20278761113
20288861114
20298962115
20308963116

American Robin Survey Routes in Indiana

Routes recording American Robin 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 →
Washington14120251987
Decatur13420251999
Plainfield12619991999
Packertown12320041967
South Bend11619911966
Maplewood11620212000
Portage11420042000
Middlebury11320251989
Tipton11019921966
Columbia Cty10520241981
Witts Station9620252000
Jamestown9520251986
Laporte8720241999
Brookville8620251966
Portage 28320252005
Muncie8219971981
Anderson8020252000
Galveston7820251981
Thorntown7720251982
Friendswood7720241986
Gary7419991980
Wabash7420251981
Wallace7420241999
Scottsburg7120251982
Montpelier6720242018

American Robin Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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