BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

Barred Owl In Great Basin

All regionsGreat BasinGeneralists

Barred Owl in Great Basin has declined: down 40% on the route-weighted index since 1991.

-40%Since 1991TrendPercent 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 →
17Routes 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 →
24YearsYears 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 Barred Owl in Great Basin. See the full index history below.

Barred Owl In Great Basin Population Forecast

If the recent trend holds, Barred Owl in Great Basin is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.03). A 5-year backtest shows a typical error of ±62%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.01Projected 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 →
0.00–0.0395% 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 →
±62%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, Barred Owl in Great Basin is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.03). A 5-year backtest shows a typical error of ±62%, with 100% of held-out values landing inside the 95% band.19772029
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 →
20250.010.000.03
20260.010.000.03
20270.010.000.03
20280.010.000.03
20290.010.000.03

Routes In Great Basin

Routes recording Barred Owl 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 →
SpringfieldIDAHO31981
Silver CityIDAHO22007
RimrockWASHINGTON22000
GlacierWASHINGTON22023
MazamaWASHINGTON22019
L. WenatcheeWASHINGTON22011
PaisleyOREGON12013
NewhalemWASHINGTON12024
KendallWASHINGTON12021
LeavenworthWASHINGTON12007
White ChuckWASHINGTON12021
CarltonWASHINGTON12019
Suiattle RivWASHINGTON12002
ConcreteWASHINGTON12024
Index 2WASHINGTON12023
Cascade RivWASHINGTON11993
E. Mt. AdamsWASHINGTON12013

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