BirdAnalyst
Species · BCR 18 · BBS 2025 Release · 1966–2024

Common Raven In Shortgrass Prairie

All regionsShortgrass PrairieGeneralists

Common Raven in Shortgrass Prairie has surged: up 239% on the route-weighted index since 1971.

+239%Since 1971TrendPercent 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 →
50Routes 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 →
53YearsYears 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 Shortgrass Prairie: up 239% on the route-weighted index since 1971.

Common Raven In Shortgrass Prairie Population Forecast

If the recent trend holds, Common Raven in Shortgrass Prairie is projected to stay roughly flat through 2029, near 1.2 (95% range 0.23–2.1). A 5-year backtest shows a typical error of ±21.1%, with 100% of held-out values landing inside the 95% band.

-4%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 →
1.2Projected 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 →
0.23–2.195% 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 →
±21.1%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 Shortgrass Prairie is projected to stay roughly flat through 2029, near 1.2 (95% range 0.23–2.1). A 5-year backtest shows a typical error of ±21.1%, 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 →
20251.10.202.1
20261.10.212.1
20271.20.222.1
20281.20.232.1
20291.20.232.1

Routes In Shortgrass Prairie

Routes recording Common Raven in Shortgrass Prairie.
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 →
PlainsTEXAS271977
PritchettCOLORADO212017
MaxwellNEW-MEXICO212024
LoganNEW-MEXICO202024
SedanNEW-MEXICO132024
VariaderoNEW-MEXICO132021
SabinosoNEW-MEXICO132021
Doyle Bridge 2COLORADO112006
TrincheraCOLORADO102022
ElbertCOLORADO92024
GrenvilleNEW-MEXICO92024
ClovisNEW-MEXICO62024
Mica ButteCOLORADO51987
CrowleyCOLORADO52024
PepNEW-MEXICO52024
FarleyNEW-MEXICO42018
FeltOKLAHOMA42024
Cone MtnCOLORADO32024
Wagon MoundNEW-MEXICO31978
DoughertyTEXAS32022
CheyenneWYOMING32023
GilpinCOLORADO22010
EdisonCOLORADO22016
GroverCOLORADO22022
LimonCOLORADO22015

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