BirdAnalyst
Species · Washington · BBS 2026 Release · 1966–2025

Common Raven Population Trend in Washington

All statesGeneralists

Common Raven in Washington has surged: up 504% on the route-weighted index since 1970.

+504%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 →
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 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 504% 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 18% by 2030 — from 8.2 in 2025 to a central estimate of 9.7 (95% range 8.2–11). A 5-year backtest shows a typical error of ±10%, with 100% of held-out values landing inside the 95% band.

+18%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 →
9.7Projected 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 →
8.2–1195% 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 →
±10%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 18% by 2030 — from 8.2 in 2025 to a central estimate of 9.7 (95% range 8.2–11). A 5-year backtest shows a typical error of ±10%, 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 →
20269.17.611
20279.37.711
20289.47.911
20299.68.011
20309.78.211

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
Odessa2720251993
Scootney Reservoir2620252009
Connell2520151975
Deer Park2320151994
Raymond2220211993
Ewan 22220252023
South Elma1920241975
Snowden1820251972
Omak Creek1520241996
Rainier1520251993
Chewelah1420211977
Asotin1420251985
Kamilche1320251997
Kendall1320251981
Hartline1320241994
Montesand1320241986
Port Angeles1220251975
Mercer1220221977
Glacier1220241979
Twin Lakes1220251983

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 2026-08-14.