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

Chihuahuan Raven In Shortgrass Prairie

All regionsShortgrass PrairieGeneralists

Chihuahuan Raven in Shortgrass Prairie has edged up: up 19% on the route-weighted index since 1970.

+19%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 →
57YearsYears 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 stay roughly flat through 2030, near 3.7 (95% range 0.42–7.0). A 5-year backtest shows a typical error of ±27.8%, with 100% of held-out values landing inside the 95% band.

+7%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 →
3.7Projected 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 →
0.42–7.095% 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 →
±27.8%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 stay roughly flat through 2030, near 3.7 (95% range 0.42–7.0). A 5-year backtest shows a typical error of ±27.8%, 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 →
20263.70.427.0
20273.70.427.0
20283.70.427.0
20293.70.427.0
20303.70.427.0

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
RosebudNEW-MEXICO422025
TimpasCOLORADO312025
HobbsNEW-MEXICO302025
PritchettCOLORADO272025
RatonNEW-MEXICO251994
GilpinCOLORADO182025
CampoCOLORADO162025
CaprockNEW-MEXICO152025
VariaderoNEW-MEXICO152022
DalhartTEXAS132025
TexlineTEXAS122025
FloydNEW-MEXICO112025
PlainsTEXAS112017
FloydadaTEXAS82024
Frankel CityTEXAS82022
CrowleyCOLORADO72023
Doyle Bridge 2COLORADO72022
LamarCOLORADO62024
VillegreenCOLORADO62019
RankinTEXAS62021
PlainsTEXAS62025
PantexTEXAS62025

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