BirdAnalyst
Species · Indiana · BBS 2025 Release · 1966–2024

American Robin Population Trend in Indiana

All statesForest birds

American Robin in Indiana has surged: up 124% on the route-weighted index since 1968.

+124%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 →
58YearsYears 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 124% 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 43% by 2029 — from 64 in 2024 to a central estimate of 91 (95% range 66–116). A 5-year backtest shows a typical error of ±61%, with 0% of held-out values landing inside the 95% band.

+43%Change by 2029TrendPercent 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 →
91Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
66–11695% 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 →
±61%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 43% by 2029 — from 64 in 2024 to a central estimate of 91 (95% range 66–116). A 5-year backtest shows a typical error of ±61%, with 0% of held-out values landing inside the 95% band.19662029
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 →
20258863113
20268963114
20278964115
20289065115
20299166116

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 →
Middlebury15120241989
Middletown12620241966
Plainfield12619991999
Washington12420241987
Packertown12320041967
Decatur12320241999
South Bend11619911966
Maplewood11620212000
Galveston11520241981
Portage11420042000
Tipton11019921966
Columbia Cty10520241981
Berne10320241966
Wabash10020241981
Hebron9620221966
Shelbyville9520241983
Thorntown9020241982
Anderson9020242000
Laporte8720241999
Muncie8219971981
Fowler7720241966
Friendswood7720241986
Scottsburg7720241982
Swayzee7520231981
Newberry7520241999

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 2026-05-22.