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

Bank Swallow In Badlands and Prairies

All regionsBadlands and PrairiesAerial insectivores

Bank Swallow in Badlands and Prairies has held roughly steady: up 1% on the route-weighted index since 1969.

+1%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 →
77Routes 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 Bank Swallow in Badlands and Prairies. See the full index history below.

Bank Swallow In Badlands and Prairies Population Forecast

If the recent trend holds, Bank Swallow in Badlands and Prairies is projected to rise about 59% by 2029 — from 1.5 in 2024 to a central estimate of 2.4 (95% range 0.46–4.3). A 5-year backtest shows a typical error of ±44.9%, with 80% of held-out values landing inside the 95% band.

+59%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 →
2.4Projected 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 →
0.46–4.395% 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 →
±44.9%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, Bank Swallow in Badlands and Prairies is projected to rise about 59% by 2029 — from 1.5 in 2024 to a central estimate of 2.4 (95% range 0.46–4.3). A 5-year backtest shows a typical error of ±44.9%, with 80% 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 →
20252.30.404.2
20262.30.414.3
20272.40.434.3
20282.40.454.3
20292.40.464.3

Routes In Badlands and Prairies

Routes recording Bank Swallow 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 →
SavageMONTANA962021
BentleyNORTH-DAKOTA662024
Dunn CenterNORTH-DAKOTA202022
Glen UllinNORTH-DAKOTA162022
MarcusSOUTH-DAKOTA162012
Eagle ButteSOUTH-DAKOTA152006
CarsonNORTH-DAKOTA142021
MayoworthWYOMING132024
NatronaWYOMING121992
PromiseSOUTH-DAKOTA112015
Ft YatesNORTH-DAKOTA102001
SeelyWYOMING101995
Gvnt ValleyWYOMING102017
GorhamNORTH-DAKOTA91996
ArvadaWYOMING82024
PowdervilleMONTANA72017
SundanceWYOMING72009
HayesSOUTH-DAKOTA62022
RiverviewWYOMING61997
CircleMONTANA52017
BadlandsSOUTH-DAKOTA52012
ForsythMONTANA42023
St XavierMONTANA42006
Cabin CreekMONTANA42024
HardingSOUTH-DAKOTA42012

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