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

White-throated Sparrow Population Trend in Wisconsin

All statesGeneralists

White-throated Sparrow in Wisconsin has edged up: up 20% on the route-weighted index since 1968.

+20%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 →
57Routes 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 White-throated Sparrow 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 →

No notable trend signals for White-throated Sparrow in Wisconsin. See the full index history below.

White-throated Sparrow Population Forecast in Wisconsin

If the recent trend holds, White-throated Sparrow in Wisconsin is projected to rise about 78% by 2029 — from 2.6 in 2024 to a central estimate of 4.6 (95% range 2.6–6.7). A 5-year backtest shows a typical error of ±87.9%, with 20% of held-out values landing inside the 95% band.

+78%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 →
4.6Projected 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 →
2.6–6.795% 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 →
±87.9%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, White-throated Sparrow in Wisconsin is projected to rise about 78% by 2029 — from 2.6 in 2024 to a central estimate of 4.6 (95% range 2.6–6.7). A 5-year backtest shows a typical error of ±87.9%, with 20% 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 →
20254.62.56.6
20264.62.56.7
20274.62.66.7
20284.62.66.7
20294.62.66.7

White-throated Sparrow Survey Routes in Wisconsin

Routes recording White-throated Sparrow 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 →
Montreal2820241968
Land O Lakes2120161967
Shanagolden1920241966
Eagle River1820241966
Flambeau1620241998
Irma1320241967
Bayfield1120241967
Popple River1120241966
Conover1120241998
Land O' Lakes 21120242017
Amnicon Falls1020241998
Cavour1020241998
Hollister920241967
Rhinelander920231998
Amberg820241980
Mellen620241998
Iron River520241967
Couderay520191969
Crandon420241967
Chaffey320241966
Grand View320241966
Mcnaughton320241966
Hatfield319981970
Exeland220211969
Holway219891967

White-throated Sparrow Population Trend in Other States

connecticutmainemassachusettsmichiganminnesotanew-hampshirenew-jerseynew-yorknorth-dakotapennsylvaniavermontwest-virginia

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