BirdAnalyst
Species · Idaho · BBS 2025 Release · 1966–2024

Canada Jay Population Trend in Idaho

All statesGeneralists

Canada Jay in Idaho has increased: up 45% on the route-weighted index since 1972.

+45%Since 1972TrendPercent 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 →
28Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
51YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Canada Jay Trends in IdahoNotable 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 Canada Jay in Idaho. See the full index history below.

Canada Jay Population Forecast in Idaho

If the recent trend holds, Canada Jay in Idaho is projected to rise about 15% by 2029 — from 0.24 in 2024 to a central estimate of 0.28 (95% range 0.00–0.63). A 5-year backtest shows a typical error of ±51.9%, with 100% of held-out values landing inside the 95% band.

+15%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 →
0.28Projected 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 →
0.00–0.6395% 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 →
±51.9%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, Canada Jay in Idaho is projected to rise about 15% by 2029 — from 0.24 in 2024 to a central estimate of 0.28 (95% range 0.00–0.63). A 5-year backtest shows a typical error of ±51.9%, with 100% of held-out values landing inside the 95% band.19692029
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 →
20250.280.000.63
20260.280.000.63
20270.280.000.63
20280.280.000.63
20290.280.000.63

Canada Jay Survey Routes in Idaho

Routes recording Canada Jay in Idaho.
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 →
Pierce719981990
Avery420231979
Challis420211979
Naples320221972
Grangeville320241986
Cape Horn320241987
Centerville320152015
Mivoden220161978
Marble Creek220141991
Burgdorf220161988
Yellow Pine220141989
Featherville220141989
Nezperce119941994
Lolo Pass120191992
Golden120091987
N Fork Cda R120132001
Cascade119751975
Rochat Divde120221993
Squirrel120001971
Springfield119691969
Coolin120231986
Baldy Mountain120152014
Sawtooth City 2120222022
Salmon River119951994
Cobalt120071993

Canada Jay Population Trend in Other States

alaskaarizonacaliforniacoloradomainemichiganminnesotamontananew-hampshirenew-yorkoregonsouth-dakotautahvermontwashingtonwisconsinwyoming

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