BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

Savannah Sparrow In Badlands and Prairies

All regionsBadlands and PrairiesGrassland birds

Savannah Sparrow in Badlands and Prairies has increased: up 42% on the route-weighted index since 1969.

+42%Since 1969TrendPercent 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 →
93Routes 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 →
57YearsYears 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 →

No notable trend signals for Savannah Sparrow in Badlands and Prairies. See the full index history below.

Savannah Sparrow In Badlands and Prairies Population Forecast

If the recent trend holds, Savannah Sparrow in Badlands and Prairies is projected to rise about 23% by 2029 — from 3.4 in 2024 to a central estimate of 4.2 (95% range 2.1–6.3). A 5-year backtest shows a typical error of ±22.1%, with 100% of held-out values landing inside the 95% band.

+23%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 →
4.2Projected 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 →
2.1–6.395% 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 →
±22.1%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, Savannah Sparrow in Badlands and Prairies is projected to rise about 23% by 2029 — from 3.4 in 2024 to a central estimate of 4.2 (95% range 2.1–6.3). A 5-year backtest shows a typical error of ±22.1%, with 100% of held-out values landing inside the 95% band.19672029
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 →
20254.01.96.1
20264.11.96.2
20274.12.06.2
20284.12.06.3
20294.22.16.3

Routes In Badlands and Prairies

Routes recording Savannah Sparrow in Badlands and Prairies.
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 →
Two DotMONTANA682024
DickinsonNORTH-DAKOTA542024
GorhamNORTH-DAKOTA422018
ShawneeWYOMING332002
BowmanNORTH-DAKOTA222024
GolvaNORTH-DAKOTA182023
ShawmutMONTANA152024
Eagle ButteSOUTH-DAKOTA142015
WinifredMONTANA122023
Maynard CouleeMONTANA112024
IsabelSOUTH-DAKOTA112015
Coleman CouleeMONTANA102023
Cedar CreekNORTH-DAKOTA102022
Wheat BasinMONTANA92024
Winifred 2MONTANA92024
St XavierMONTANA82010
ClarkelenWYOMING81977
RecluseWYOMING82023
Soda WellWYOMING82024
Flatwillow 2MONTANA72023
Glen UllinNORTH-DAKOTA62022
LaplantSOUTH-DAKOTA62009
VolunteerSOUTH-DAKOTA62012
RiverviewWYOMING61988
Reed PointMONTANA52024

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