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

Common Raven Population Trend in Washington

All statesGeneralists

Common Raven in Washington has surged: up 483% on the route-weighted index since 1970.

+483%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 →
112Routes 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 →
56YearsYears 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 WashingtonNotable 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 Washington: up 483% on the route-weighted index since 1970.

Common Raven Population Forecast in Washington

If the recent trend holds, Common Raven in Washington is projected to rise about 24% by 2029 — from 7.8 in 2024 to a central estimate of 9.6 (95% range 8.1–11). A 5-year backtest shows a typical error of ±7.9%, with 100% of held-out values landing inside the 95% band.

+24%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 →
9.6Projected 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 →
8.1–1195% 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 →
±7.9%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, Common Raven in Washington is projected to rise about 24% by 2029 — from 7.8 in 2024 to a central estimate of 9.6 (95% range 8.1–11). A 5-year backtest shows a typical error of ±7.9%, with 100% 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 →
20259.07.511
20269.27.611
20279.37.811
20289.57.911
20299.68.111

Common Raven Survey Routes in Washington

Routes recording Common Raven in Washington.
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 Er3319961988
Potholes3220231996
Hanford Site3119961988
Bickleton3020191981
Horn Rapids2920242005
Connell2520151975
Deer Park2320151994
Raymond2220211993
Rainier2220191993
Asotin1920241985
South Elma1920241975
Pe Ell1920231993
Cusick1820241982
Odessa1820241993
Kendall1520241981
Omak Creek1520241996
Ewan 21520242023
Chewelah1420211977
Port Angeles1320241975
Packwood1320241975
Hartline1320241994
Laurier1320221995
Montesand1320241986
Mercer1220221977
Glacier1220241979

Common Raven Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutgeorgiaidahokentuckymainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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