BirdAnalyst
Species · Arizona · BBS 2025 Release · 1966–2024

Common Raven Population Trend in Arizona

All statesGeneralists

Common Raven in Arizona has held roughly steady: down 8% on the route-weighted index since 1970.

-8%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 →
90Routes 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 →
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 Common Raven Trends in ArizonaNotable 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 Arizona. See the full index history below.

Common Raven Population Forecast in Arizona

If the recent trend holds, Common Raven in Arizona is projected to stay roughly flat through 2029, near 12 (95% range 7.1–17). A 5-year backtest shows a typical error of ±23.2%, with 100% of held-out values landing inside the 95% band.

+8%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 →
12Projected 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 →
7.1–1795% 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 →
±23.2%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 Arizona is projected to stay roughly flat through 2029, near 12 (95% range 7.1–17). A 5-year backtest shows a typical error of ±23.2%, 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 →
2025126.617
2026126.817
2027126.917
2028127.017
2029127.117

Common Raven Survey Routes in Arizona

Routes recording Common Raven in Arizona.
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 →
Black Mesa8019951988
Peach Spring5720241992
Seligman3720241991
Tsaile3220231993
Happy Jack3120241977
House Rock2920221968
Skull Valley2920241996
Many Farms2820061993
Hunt2720181968
Pinetop2720221993
Cutter 22620182015
Yampai2519771969
Cutter2520141992
Clay Spring2420241988
Greasewood2020031993
Round Rock1919891968
Rose Wells1919781968
Toroweap1820241994
Cow Springs1820221992
Forest Lakes1820241992
Organ Pipe1820231990
Mt Trumbull1719931974
Patagonia1720241972
Page1720191993
Ajo 21720222009

Common Raven Population Trend in Other States

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

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