BirdAnalyst
Species · BCR 2 · BBS 2025 Release · 1966–2024

Common Raven In BCR 2

All regionsBCR 2Generalists

Common Raven in BCR 2 has declined: down 36% on the route-weighted index since 1986.

-36%Since 1986TrendPercent 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 →
24Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
40YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable 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 BCR 2. See the full index history below.

Forecast

If the recent trend holds, Common Raven in BCR 2 is projected to rise about 142% by 2029 — from 2.9 in 2024 to a central estimate of 7.0 (95% range 2.3–12). A 5-year backtest shows a typical error of ±122.9%, with 40% of held-out values landing inside the 95% band.

+142%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 →
7.0Projected 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 →
2.3–1295% 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 →
±122.9%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 BCR 2 is projected to rise about 142% by 2029 — from 2.9 in 2024 to a central estimate of 7.0 (95% range 2.3–12). A 5-year backtest shows a typical error of ±122.9%, with 40% of held-out values landing inside the 95% band.19842029
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 →
20256.82.112
20266.82.112
20276.92.212
20286.92.212
20297.02.312

Routes In BCR 2

Routes recording Common Raven in BCR 2.
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 →
Dillingham (Short)ALASKA171984
DillinghamALASKA162019
KotzebueALASKA92024
TupuknukALASKA71995
King SalmonALASKA62024
St. Mary'SALASKA62014
Kotzebue (Short)ALASKA61994
Goodnews BayALASKA52005
CouncilALASKA42024
Kanektok RivALASKA42005
Selawik (Short)ALASKA41986
Cape NomeALASKA32024
Togiak RiverALASKA32005
Kugarak (Short)ALASKA31987
KodiakALASKA21984
Katmai N.P.ALASKA22014
Cold BayALASKA22024
Gweek RiverALASKA22002
ChiniakALASKA12023
Kodiak 2ALASKA12024
NomeALASKA12023
Salmon LakeALASKA12024
TellerALASKA12019
Cold Bay (Short)ALASKA11992

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