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

Red-shouldered Hawk Population Trend in Indiana

All statesGeneralists

Red-shouldered Hawk in Indiana has surged: up 436% on the route-weighted index since 1968.

+436%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 →
44Routes 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 →
55YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Red-shouldered Hawk 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 →

Red-shouldered Hawk has surged in Indiana: up 436% on the route-weighted index since 1968.

Red-shouldered Hawk Population Forecast in Indiana

If the recent trend holds, Red-shouldered Hawk in Indiana is projected to fall about 63% by 2029 — from 1.4 in 2024 to a central estimate of 0.52 (95% range 0.16–0.89). A 5-year backtest shows a typical error of ±50%, with 40% of held-out values landing inside the 95% band.

-63%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 →
0.52Projected 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 →
0.16–0.8995% 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 →
±50%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, Red-shouldered Hawk in Indiana is projected to fall about 63% by 2029 — from 1.4 in 2024 to a central estimate of 0.52 (95% range 0.16–0.89). A 5-year backtest shows a typical error of ±50%, with 40% 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 →
20250.490.130.85
20260.500.130.86
20270.510.140.87
20280.510.150.88
20290.520.160.89

Red-shouldered Hawk Survey Routes in Indiana

Routes recording Red-shouldered Hawk 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 →
Celestine820241980
Clear Spring820241989
Azalia720241984
Belmont620241988
Spencer520241977
Georgia520241999
Brazil420241966
Galveston320242024
Scottsburg320241982
Wallace320242014
Portage 2320242024
Hoosier220241991
Cumback220211978
Indian Spgs220242005
Corydon220241967
Witts Station220242024
Lakeville220242012
Gary119841984
Knox120242022
Middlebury120162016
Columbia Cty120042004
Indiana Dune120242000
W Lafayette120242024
Monticello120242023
Maplewood120192019

Red-shouldered Hawk Population Trend in Other States

alabamaarkansascaliforniaconnecticutdelawarefloridageorgiaillinoisiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawashingtonwest-virginiawisconsin

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