BirdAnalyst
Species · BCR 22 · BBS 2025 Release · 1966–2024

Eastern Bluebird In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieForest birds

Eastern Bluebird in Eastern Tallgrass Prairie has risen sharply: up 66% on the route-weighted index since 1968.

+66%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 →
275Routes In RegionSurvey 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 SignalsNotable 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 →

Eastern Bluebird has risen sharply in Eastern Tallgrass Prairie: up 66% on the route-weighted index since 1968.

Eastern Bluebird In Eastern Tallgrass Prairie Population Forecast

If the recent trend holds, Eastern Bluebird in Eastern Tallgrass Prairie is projected to stay roughly flat through 2029, near 6.6 (95% range 4.1–9.1). A 5-year backtest shows a typical error of ±81.1%, with 40% 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 →
6.6Projected 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 →
4.1–9.195% 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 →
±81.1%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, Eastern Bluebird in Eastern Tallgrass Prairie is projected to stay roughly flat through 2029, near 6.6 (95% range 4.1–9.1). A 5-year backtest shows a typical error of ±81.1%, 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 →
20256.33.88.8
20266.43.98.8
20276.43.98.9
20286.54.09.0
20296.64.19.1

Routes In Eastern Tallgrass Prairie

Routes recording Eastern Bluebird in Eastern Tallgrass Prairie.
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 →
FrazierMISSOURI372024
KingsvilleMISSOURI332024
LucerneMISSOURI332021
BucyrusKANSAS312024
KearneyMISSOURI312024
MilfordMISSOURI282024
GildehouseMISSOURI271989
Trading PostKANSAS242024
Marion 2OHIO242024
ReeceKANSAS232024
CameronMISSOURI222023
WainwrightOKLAHOMA222013
OhioMISSOURI212024
LincolnvilleKANSAS202024
SticklervillMISSOURI192024
BarclayKANSAS182024
KahokaMISSOURI181998
WrefordKANSAS162024
RockinghamMISSOURI162024
MarshallILLINOIS152024
BrookvilleINDIANA152024
MoselleMISSOURI152024
W CarrolltonOHIO152015
River FallsWISCONSIN152024
FloraILLINOIS142024

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