BirdAnalyst
Species · BCR 9 · BBS 2026 Release · 1966–2025

Bank Swallow In Great Basin

All regionsGreat BasinAerial insectivores

Bank Swallow in Great Basin has declined: down 47% on the route-weighted index since 1970.

-47%Since 1970TrendPercent 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 →
129Routes 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 Great Basin. See the full index history below.

Bank Swallow In Great Basin Population Forecast

If the recent trend holds, Bank Swallow in Great Basin is projected to rise about 180% by 2030 — from 1.5 in 2025 to a central estimate of 4.3 (95% range 0.00–8.7). A 5-year backtest shows a typical error of ±182.1%, with 100% of held-out values landing inside the 95% band.

+180%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 →
4.3Projected 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 →
0.00–8.795% 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 →
±182.1%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, Bank Swallow in Great Basin is projected to rise about 180% by 2030 — from 1.5 in 2025 to a central estimate of 4.3 (95% range 0.00–8.7). A 5-year backtest shows a typical error of ±182.1%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20264.30.008.7
20274.30.008.7
20284.30.008.7
20294.30.008.7
20304.30.008.7

Routes In Great Basin

Routes recording Bank Swallow in Great Basin.
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 →
GardnervilleNEVADA1792005
Glenns FerryIDAHO1621986
PomonaWASHINGTON1001999
PocatelloIDAHO912019
Hanford SiteWASHINGTON741996
Ewan 2WASHINGTON722025
MesaWASHINGTON712008
NighthawkWASHINGTON602024
PrestonIDAHO542023
YakimaWASHINGTON522024
Gardnerville 2NEVADA482025
Modoc PointOREGON472014
WapatoWASHINGTON412022
SpringfieldIDAHO352018
Pasadena ValIDAHO302016
LeadoreIDAHO252024
EllensburgWASHINGTON182024
Cedar HillIDAHO162024
OthelloWASHINGTON161991
MercerWASHINGTON152006
EwanWASHINGTON152019
Grouse CreekUTAH141983
Scootney ReservoirWASHINGTON142025
CedarvilleCALIFORNIA132024
FallonNEVADA132014

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