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

Common Raven Population Trend in Idaho

All statesGeneralists

Common Raven in Idaho has surged: up 278% on the route-weighted index since 1971.

+278%Since 1971TrendPercent 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 →
66Routes 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 →
55YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Common Raven 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Common Raven has surged in Idaho: up 278% on the route-weighted index since 1971.

Common Raven Population Forecast in Idaho

If the recent trend holds, Common Raven in Idaho is projected to fall about 15% by 2029 — from 12 in 2024 to a central estimate of 10 (95% range 6.0–15). A 5-year backtest shows a typical error of ±33%, with 40% 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 →
10Projected 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 →
6.0–1595% 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 →
±33%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, Common Raven in Idaho is projected to fall about 15% by 2029 — from 12 in 2024 to a central estimate of 10 (95% range 6.0–15). A 5-year backtest shows a typical error of ±33%, with 40% of held-out values landing inside the 95% band.19682029
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 →
20259.65.414
20269.85.514
20279.95.714
2028105.814
2029106.015

Common Raven Survey Routes in Idaho

Routes recording Common Raven 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 →
Silver City7320241989
Dubois4220241982
Tractor Flat2720241987
Twin Buttes1820241985
Mivoden1720231977
Blacks Creek1720171968
Daniels Res1720191989
Craters1620181981
Coolin1620241986
Triangle1520241985
Dougal Res1520241988
Mora1420242018
Golden1320161987
Acequia1320121987
Circular Bu1320241988
Nezperce1220121968
Lolo Pass1220191992
Blackft Res1120181985
N Fork Cda R1020191993
Glenns Ferry919861968
Carey920181989
Cedar Hill920241989
Lost River820241985
Picabo820211989
Baker720241974

Common Raven Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutgeorgiakentuckymainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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