BirdAnalyst
Species · North Dakota · BBS 2026 Release · 1966–2025

Common Raven Population Trend in North Dakota

All statesGeneralists

Common Raven in North Dakota has surged: up 518% on the route-weighted index since 2004.

+518%Since 2004TrendPercent 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 →
17Routes 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 →
21YearsYears 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 North DakotaNotable 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 North Dakota: up 518% on the route-weighted index since 2004.

Common Raven Population Forecast in North Dakota

If the recent trend holds, Common Raven in North Dakota is projected to rise about 138% by 2030 — from 0.18 in 2025 to a central estimate of 0.44 (95% range 0.23–0.65). A 5-year backtest shows a typical error of ±51.5%, with 80% of held-out values landing inside the 95% band.

+138%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 →
0.44Projected 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 →
0.23–0.6595% 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 →
±51.5%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 North Dakota is projected to rise about 138% by 2030 — from 0.18 in 2025 to a central estimate of 0.44 (95% range 0.23–0.65). A 5-year backtest shows a typical error of ±51.5%, with 80% of held-out values landing inside the 95% band.20022030
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 →
20260.380.170.59
20270.400.180.61
20280.410.200.63
20290.420.210.64
20300.440.230.65

Common Raven Survey Routes in North Dakota

Routes recording Common Raven in North Dakota.
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 →
Sheyenne Lk720242014
Bowesmont520132013
Nash420162013
Webster420212021
Powers Lake320232018
Turtle Mtns320252002
Loraine320192015
Dunn Center220222021
Golva120112011
Wild Rose120222022
Emerado120252019
Cooperstown120252025
Douglas Crk120182018
Rolla120212021
Niles120232015
Carpio120232023
Denbigh120232008

Common Raven Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutgeorgiaidahokentuckymainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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