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Species · Alaska · BBS 2025 Release · 1966–2024

Common Raven Population Trend in Alaska

All statesGeneralists

Common Raven in Alaska has increased: up 48% on the route-weighted index since 1972.

+48%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 →
132Routes 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 →
50YearsYears 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 AlaskaNotable 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 Common Raven in Alaska. See the full index history below.

Common Raven Population Forecast in Alaska

If the recent trend holds, Common Raven in Alaska is projected to stay roughly flat through 2029, near 4.7 (95% range 0.00–12). A 5-year backtest shows a typical error of ±10.1%, with 100% of held-out values landing inside the 95% band.

-7%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 →
4.7Projected 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 →
0.00–1295% 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 →
±10.1%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 Alaska is projected to stay roughly flat through 2029, near 4.7 (95% range 0.00–12). A 5-year backtest shows a typical error of ±10.1%, 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 →
20254.90.0012
20264.80.0012
20274.80.0012
20284.70.0012
20294.70.0012

Common Raven Survey Routes in Alaska

Routes recording Common Raven in Alaska.
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 →
Sitka (Short)6919921984
Juneau Alt3219861984
Juneau3020241983
Thorne Bay 22420242013
Ketchikan2320221971
Sitka2220241993
Craig2120241985
Thorne Bay2120121989
Dillingham (Short)1719841984
Dillingham1620191993
Yakutat (Short)1319841984
Kachemak1320241987
Galena (Short)1220241987
Haines1120241972
Whale Pass1120241997
Ruby1120241994
Zarembo1120241993
Cordova1020241983
Zimovia Strt1020241988
Nicholai Sl920241994
Kotzebue920242001
Homer819821978
Kalifonsky820231982
Coldfoot820241994
Tangle Lakes819871987

Common Raven Population Trend in Other States

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

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