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

Western Meadowlark In Great Basin

All regionsGreat BasinGrassland birds

Western Meadowlark in Great Basin has held roughly steady: down 2% on the route-weighted index since 1970.

-2%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 →
246Routes 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 Western Meadowlark in Great Basin. See the full index history below.

Western Meadowlark In Great Basin Population Forecast

If the recent trend holds, Western Meadowlark in Great Basin is projected to stay roughly flat through 2030, near 44 (95% range 25–62). A 5-year backtest shows a typical error of ±21.1%, 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 →
44Projected 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 →
25–6295% 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 →
±21.1%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, Western Meadowlark in Great Basin is projected to stay roughly flat through 2030, near 44 (95% range 25–62). A 5-year backtest shows a typical error of ±21.1%, 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 →
2026452663
2027442663
2028442663
2029442562
2030442562

Routes In Great Basin

Routes recording Western Meadowlark 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 →
Arid Land ErWASHINGTON2921996
Glenns FerryIDAHO2581986
ZumwaltOREGON2562005
Hanford SiteWASHINGTON2321996
OthelloWASHINGTON2221991
Honey LakeCALIFORNIA1972025
Clear Lk ResCALIFORNIA1842018
OreanaNEVADA1762003
GoshenUTAH1702025
MidasNEVADA1632025
SheavilleOREGON1482025
Bowden HillsOREGON1472025
Alvord LakeOREGON1382025
Willow SpgOREGON1381971
Harney LakeOREGON1312024
Hot SpringIDAHO1302025
DuboisIDAHO1292025
Toiyabe NfNEVADA1292024
VernonUTAH1282025
SnowvilleUTAH1282025
UmatillaOREGON1252025
Trout CreekOREGON1242025
Three ForksOREGON1242025
Timpie SpgUTAH1152003
MontagueOREGON1132025

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