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

Chipping Sparrow Population Trend in Vermont

All statesGeneralists

Chipping Sparrow in Vermont has held roughly steady: down 9% on the route-weighted index since 1968.

-9%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 Chipping Sparrow 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 Chipping Sparrow in Vermont. See the full index history below.

Chipping Sparrow Population Forecast in Vermont

If the recent trend holds, Chipping Sparrow in Vermont is projected to stay roughly flat through 2029, near 8.6 (95% range 4.4–13). A 5-year backtest shows a typical error of ±15.5%, with 100% of held-out values landing inside the 95% band.

-7%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 →
8.6Projected 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 →
4.4–1395% 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 →
±15.5%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, Chipping Sparrow in Vermont is projected to stay roughly flat through 2029, near 8.6 (95% range 4.4–13). A 5-year backtest shows a typical error of ±15.5%, 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 →
20258.84.513
20268.74.513
20278.74.413
20288.74.413
20298.64.413

Chipping Sparrow Survey Routes in Vermont

Routes recording Chipping Sparrow 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 →
Marlboro2720241966
Shaftsbury2520241966
East Haven2020241966
Waterville1919801967
Hinesburg1419941966
Bristol1420181995
Stratton1120241966
East Calais1120241967
Gaysville920211966
Newbury920041986
Stowe920241988
Hardwick820241966
Landgrove720241966
Middlesex720241968
Fletcher720241968
Grand Isle720241968
S Reading620241966
S Wallingfrd620221966
St Johnsbury620241970
North Pownal520221966
W Rutland520241966
Newbury 2520232005
Post Mills420241966
Northfld Fls320211980
Greensboro320241967

Chipping Sparrow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvirginiawashingtonwest-virginiawisconsinwyoming

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