BirdAnalyst
Species · BCR 18 · BBS 2026 Release · 1966–2025

Common Raven In Shortgrass Prairie

All regionsShortgrass PrairieGeneralists

Common Raven in Shortgrass Prairie has surged: up 231% on the route-weighted index since 1971.

+231%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 →
53Routes 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 →
54YearsYears 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 231% 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 fall about 17% by 2030 — from 1.4 in 2025 to a central estimate of 1.2 (95% range 0.27–2.1). A 5-year backtest shows a typical error of ±24.1%, with 100% of held-out values landing inside the 95% band.

-17%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 →
1.2Projected 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 →
0.27–2.195% 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 →
±24.1%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 fall about 17% by 2030 — from 1.4 in 2025 to a central estimate of 1.2 (95% range 0.27–2.1). A 5-year backtest shows a typical error of ±24.1%, with 100% 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 →
20261.20.242.1
20271.20.252.1
20281.20.262.1
20291.20.262.1
20301.20.272.1

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
ElbertCOLORADO262025
SedanNEW-MEXICO242025
PritchettCOLORADO212017
LoganNEW-MEXICO172025
MaxwellNEW-MEXICO142025
VariaderoNEW-MEXICO132021
SabinosoNEW-MEXICO132021
FarleyNEW-MEXICO112025
TrincheraCOLORADO102022
GrenvilleNEW-MEXICO62025
ClovisNEW-MEXICO62024
Mica ButteCOLORADO51987
CrowleyCOLORADO52024
PepNEW-MEXICO52024
Cooley LakeNEW-MEXICO42025
FeltOKLAHOMA42024
Cone MtnCOLORADO32024
Wagon MoundNEW-MEXICO31978
DoughertyTEXAS32022
CheyenneWYOMING32023
GilpinCOLORADO22010
EdisonCOLORADO22016
Kiowa 2COLORADO22025
GroverCOLORADO22022

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