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Species · BCR 20 · BBS 2026 Release · 1966–2025

Chihuahuan Raven In Edwards Plateau

All regionsEdwards PlateauGeneralists

Chihuahuan Raven in Edwards Plateau has declined: down 44% on the route-weighted index since 1975.

-44%Since 1975TrendPercent 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 →
5Routes 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 →
27YearsYears 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 Edwards Plateau. See the full index history below.

Chihuahuan Raven In Edwards Plateau Population Forecast

If the recent trend holds, Chihuahuan Raven in Edwards Plateau is projected to fall about 12% by 2030 — from 0.19 in 2025 to a central estimate of 0.17 (95% range 0.00–0.44). A 5-year backtest shows a typical error of ±155.1%, with 100% of held-out values landing inside the 95% band.

-12%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 →
0.17Projected 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 →
0.00–0.4495% 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 →
±155.1%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 Edwards Plateau is projected to fall about 12% by 2030 — from 0.19 in 2025 to a central estimate of 0.17 (95% range 0.00–0.44). A 5-year backtest shows a typical error of ±155.1%, with 100% of held-out values landing inside the 95% band.19692030
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 →
20260.170.000.45
20270.170.000.45
20280.170.000.44
20290.170.000.44
20300.170.000.44

Routes In Edwards Plateau

Routes recording Chihuahuan Raven in Edwards Plateau.
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 →
Indian MtnTEXAS32025
MontellTEXAS32007
RockspringTEXAS32016
UtopiaTEXAS22000
San SabaTEXAS21986

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