BirdAnalyst
Species · BCR 17 · BBS 2026 Release · 1966–2025

Brewer's Blackbird In Badlands and Prairies

All regionsBadlands and PrairiesGeneralists

Brewer's Blackbird in Badlands and Prairies has increased: up 29% on the route-weighted index since 1969.

+29%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 →
131Routes 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 →

No notable trend signals for Brewer's Blackbird in Badlands and Prairies. See the full index history below.

Brewer's Blackbird In Badlands and Prairies Population Forecast

If the recent trend holds, Brewer's Blackbird in Badlands and Prairies is projected to stay roughly flat through 2030, near 12 (95% range 5.5–18). A 5-year backtest shows a typical error of ±5.2%, with 100% of held-out values landing inside the 95% band.

-0%Change by 2030TrendPercent 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 →
12Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
5.5–1895% 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 →
±5.2%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, Brewer's Blackbird in Badlands and Prairies is projected to stay roughly flat through 2030, near 12 (95% range 5.5–18). A 5-year backtest shows a typical error of ±5.2%, with 100% of held-out values landing inside the 95% band.19672030
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 →
2026125.518
2027125.518
2028125.518
2029125.518
2030125.518

Routes In Badlands and Prairies

Routes recording Brewer's Blackbird 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 →
BillWYOMING672018
LuskWYOMING642025
LeroyMONTANA522025
SavageMONTANA432025
AlbionMONTANA412025
RozetWYOMING382025
LindsayMONTANA372024
Gvnt ValleyWYOMING362025
Wheat BasinMONTANA322025
BucknumWYOMING322024
Hehn DrawMONTANA282025
Soda WellWYOMING282025
SolenNORTH-DAKOTA272025
RevaSOUTH-DAKOTA252025
NewcastleWYOMING242025
RoyMONTANA232025
Wind Cave NpSOUTH-DAKOTA232025
SeelyWYOMING232000
ShawmutMONTANA222025
NatronaWYOMING221992
Bull Mtn.MONTANA202021
Ft YatesNORTH-DAKOTA202004
GlenrockWYOMING201977
DwyerWYOMING202025
ShawneeWYOMING202025

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.