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

Chihuahuan Raven In Shortgrass Prairie

All regionsShortgrass PrairieGeneralists

Chihuahuan Raven in Shortgrass Prairie has held roughly steady: up 10% on the route-weighted index since 1970.

+10%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 →
69Routes 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 →

No notable trend signals for Chihuahuan Raven in Shortgrass Prairie. See the full index history below.

Chihuahuan Raven In Shortgrass Prairie Population Forecast

If the recent trend holds, Chihuahuan Raven in Shortgrass Prairie is projected to rise about 37% by 2029 — from 2.7 in 2024 to a central estimate of 3.8 (95% range 0.42–7.1). A 5-year backtest shows a typical error of ±29.1%, with 100% of held-out values landing inside the 95% band.

+37%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 →
3.8Projected 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 →
0.42–7.195% 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 →
±29.1%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, Chihuahuan Raven in Shortgrass Prairie is projected to rise about 37% by 2029 — from 2.7 in 2024 to a central estimate of 3.8 (95% range 0.42–7.1). A 5-year backtest shows a typical error of ±29.1%, 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 →
20253.70.417.1
20263.70.417.1
20273.70.417.1
20283.80.417.1
20293.80.427.1

Routes In Shortgrass Prairie

Routes recording Chihuahuan 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 →
FeltOKLAHOMA722023
MaljamarNEW-MEXICO611977
PepNEW-MEXICO472024
HobbsNEW-MEXICO262024
RatonNEW-MEXICO251994
CampoCOLORADO202019
PritchettCOLORADO152024
VariaderoNEW-MEXICO152022
TexlineTEXAS152024
GilpinCOLORADO142024
FloydNEW-MEXICO132024
CaprockNEW-MEXICO132024
FarleyNEW-MEXICO122024
DalhartTEXAS122024
PlainsTEXAS112017
TimpasCOLORADO102019
EdlerCOLORADO92023
FloydadaTEXAS82024
Frankel CityTEXAS82022
CrowleyCOLORADO72023
Doyle Bridge 2COLORADO72022
FrionaTEXAS72024
LamarCOLORADO62024
VillegreenCOLORADO62019
RankinTEXAS62021

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