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

American Robin Population Trend in Wisconsin

All statesForest birds

American Robin in Wisconsin has risen sharply: up 63% on the route-weighted index since 1968.

+63%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 →
98Routes 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 WisconsinNotable 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 risen sharply in Wisconsin: up 63% on the route-weighted index since 1968.

American Robin Population Forecast in Wisconsin

If the recent trend holds, American Robin in Wisconsin is projected to stay roughly flat through 2030, near 61 (95% range 51–71). A 5-year backtest shows a typical error of ±13.8%, with 80% of held-out values landing inside the 95% band.

+6%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 →
61Projected 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 →
51–7195% 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 →
±13.8%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 Wisconsin is projected to stay roughly flat through 2030, near 61 (95% range 51–71). A 5-year backtest shows a typical error of ±13.8%, with 80% 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 →
2026604970
2027605070
2028605070
2029605071
2030615171

American Robin Survey Routes in Wisconsin

Routes recording American Robin in Wisconsin.
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 →
Trempealeau15820251966
Beloit14420251998
Grimms14120211998
Raymond14020251966
Eden12620251966
Paris11920251966
Pardeeville11620251967
Omro 211020252002
Omro10920011966
Fall River10920251966
Hazel Green10920251966
N Freedom10820251966
Annaton10820251998
N Andover10320251967
Mukwonago9420041998
Manitowoc8920241966
Pt Washingtn8620241966
Weyerhauser8420251966
Cochrane8120251966
Brownsville7920251966
Rolling Pr7620251966
Gilman7420251966
Wis Rapids7320231966
Newburg Crns7320251966
Verona7320251991

American Robin Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawyoming

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