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Species · Indiana · BBS 2025 Release · 1966–2024

Carolina Chickadee Population Trend in Indiana

All statesForest birds

Carolina Chickadee in Indiana has surged: up 85% on the route-weighted index since 1968.

+85%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 →
52Routes 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 Carolina Chickadee 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 →

Carolina Chickadee has surged in Indiana: up 85% on the route-weighted index since 1968.

Carolina Chickadee Population Forecast in Indiana

If the recent trend holds, Carolina Chickadee in Indiana is projected to stay roughly flat through 2029, near 3.7 (95% range 2.5–4.9). A 5-year backtest shows a typical error of ±9.9%, with 100% of held-out values landing inside the 95% band.

+8%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 →
3.7Projected 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 →
2.5–4.995% 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 →
±9.9%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, Carolina Chickadee in Indiana is projected to stay roughly flat through 2029, near 3.7 (95% range 2.5–4.9). A 5-year backtest shows a typical error of ±9.9%, 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 →
20253.62.34.8
20263.62.44.8
20273.62.44.8
20283.72.54.9
20293.72.54.9

Carolina Chickadee Survey Routes in Indiana

Routes recording Carolina Chickadee 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 →
Belmont2420241981
New Phila1520241982
Indian Spgs1420241982
Wallace1320242000
Monticello920241984
Millersburg820241981
Witts Station820242000
Georgia820241999
Azalia720241982
Swayzee620231987
Clear Spring620241981
Hoosier520241990
Friendswood520241986
Jamestown520241999
Spencer520241970
Washington520241987
Corydon520241966
Newberry520231999
Cyprss520241999
Galveston420241981
Celestine420241979
Evansville420221966
New Castle420242002
Columbia Cty320241983
Packertown320041983

Carolina Chickadee Population Trend in Other States

alabamaarkansasdelawarefloridageorgiaillinoiskansaskentuckylouisianamarylandmississippimissourinew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniasouth-carolinatennesseetexasvirginiawest-virginia

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