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

Indigo Bunting Population Trend in Vermont

All statesGeneralists

Indigo Bunting in Vermont has increased: up 33% on the route-weighted index since 1968.

+33%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 →
26Routes 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 Indigo Bunting Trends in VermontNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Indigo Bunting in Vermont. See the full index history below.

Indigo Bunting Population Forecast in Vermont

If the recent trend holds, Indigo Bunting in Vermont is projected to stay roughly flat through 2029, near 4.2 (95% range 1.7–6.7). A 5-year backtest shows a typical error of ±14.4%, with 100% of held-out values landing inside the 95% band.

+2%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 →
4.2Projected 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 →
1.7–6.795% 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 →
±14.4%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, Indigo Bunting in Vermont is projected to stay roughly flat through 2029, near 4.2 (95% range 1.7–6.7). A 5-year backtest shows a typical error of ±14.4%, with 100% 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 →
20254.11.76.6
20264.11.76.6
20274.21.76.6
20284.21.76.6
20294.21.76.7

Indigo Bunting Survey Routes in Vermont

Routes recording Indigo Bunting in Vermont.
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 →
Shaftsbury1220241966
Hinesburg1019941966
Greensboro920241967
Landgrove720241966
S Wallingfrd720221966
Middlesex720241968
W Rutland620241966
East Calais620231966
Stowe620241988
St Johnsbury520241970
East Haven520241966
Newbury 2520232005
S Reading420241966
Post Mills420241966
Stratton320241966
Northfld Fls320211980
Marlboro220241966
Gaysville220211966
Hardwick220241966
Fletcher220241971
Waterville219801967
Bristol220181995
North Pownal120231966
Newbury120021986
Colchester120181986

Indigo Bunting Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvirginiawest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.