BirdAnalyst
Species · BCR 10 · BBS 2025 Release · 1966–2024

Common Raven In Northern Rockies

All regionsNorthern RockiesGeneralists

Common Raven in Northern Rockies has surged: up 121% on the route-weighted index since 1970.

+121%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 →
226Routes 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 →
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 SignalsNotable 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 Northern Rockies: up 121% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Common Raven in Northern Rockies is projected to stay roughly flat through 2029, near 8.5 (95% range 7.0–9.9). A 5-year backtest shows a typical error of ±4.3%, with 100% of held-out values landing inside the 95% band.

+2%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 →
8.5Projected 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 →
7.0–9.995% 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 →
±4.3%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 Northern Rockies is projected to stay roughly flat through 2029, near 8.5 (95% range 7.0–9.9). A 5-year backtest shows a typical error of ±4.3%, 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 →
20258.16.69.5
20268.26.79.6
20278.36.89.7
20288.46.99.8
20298.57.09.9

Routes In Northern Rockies

Routes recording Common Raven in Northern Rockies.
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 →
BoulderMONTANA1192024
Malheur Res.OREGON672023
MadrasOREGON572024
Ne EntranceWYOMING472021
WalcottWYOMING422024
Wolf CreekMONTANA412022
Sand DrawWYOMING402024
Elk HornWYOMING382018
BaggsWYOMING272024
PhilipsburgMONTANA242024
PolsonMONTANA232024
Deer ParkWASHINGTON232015
Clyde ParkMONTANA222024
WorlandWYOMING192024
CusickWASHINGTON182024
MeeteetseWYOMING182024
ArmintoWYOMING182024
MivodenIDAHO172023
Church HillMONTANA172024
Bald MtnWYOMING172024
CoolinIDAHO162024
Willow Creek 2MONTANA162024
Mount VernonOREGON152024
Omak CreekWASHINGTON152024
SweetwaterWYOMING152024

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