BirdAnalyst
Species · BCR 34 · BBS 2026 Release · 1966–2025

Common Raven In Sierra Madre Occidental

All regionsSierra Madre OccidentalGeneralists

Common Raven in Sierra Madre Occidental has surged: up 592% on the route-weighted index since 1970.

+592%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 →
37Routes 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 Sierra Madre Occidental: up 592% on the route-weighted index since 1970.

Common Raven In Sierra Madre Occidental Population Forecast

If the recent trend holds, Common Raven in Sierra Madre Occidental is projected to stay roughly flat through 2030, near 13 (95% range 10–16). A 5-year backtest shows a typical error of ±30%, with 80% of held-out values landing inside the 95% band.

-7%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 →
13Projected 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 →
10–1695% 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 →
±30%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 Sierra Madre Occidental is projected to stay roughly flat through 2030, near 13 (95% range 10–16). A 5-year backtest shows a typical error of ±30%, with 80% 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 →
2026129.315
2027139.516
2028139.716
2029139.916
2030131016

Routes In Sierra Madre Occidental

Routes recording Common Raven in Sierra Madre Occidental.
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 →
PomereneARIZONA542025
Skull Valley 2ARIZONA462025
Skull ValleyARIZONA292024
Happy JackARIZONA282025
Tonto Vill.ARIZONA272025
PinetopARIZONA272022
CutterARIZONA252014
PatagoniaARIZONA242025
WilliamsARIZONA222025
RedingtonARIZONA222025
PrescottARIZONA192025
SprucedaleARIZONA182025
BlueARIZONA161991
AlpineARIZONA162025
Clay SpringARIZONA152025
Carr MtnARIZONA152025
Emory PassNEW-MEXICO122025
San SimonARIZONA112024
PortalARIZONA102025
ReserveNEW-MEXICO102025
Sunizona 2ARIZONA92025
Bartlett ResARIZONA82025
SahuaritaARIZONA82025
DragoonARIZONA82009
Forest LakesARIZONA52025

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.