BirdAnalyst
Species · BCR 20 · BBS 2025 Release · 1966–2024

Common Raven In Edwards Plateau

All regionsEdwards PlateauGeneralists

Common Raven in Edwards Plateau has surged: up 14× on the route-weighted index since 1978.

14×Since 1978TrendPercent 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 →
15Routes 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 →
45YearsYears 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 Edwards Plateau: up 14× on the route-weighted index since 1978.

Forecast

If the recent trend holds, Common Raven in Edwards Plateau is projected to stay roughly flat through 2029, near 4.3 (95% range 2.4–6.2). A 5-year backtest shows a typical error of ±26.3%, with 80% of held-out values landing inside the 95% band.

-3%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 →
4.3Projected 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 →
2.4–6.295% 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 →
±26.3%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 Edwards Plateau is projected to stay roughly flat through 2029, near 4.3 (95% range 2.4–6.2). A 5-year backtest shows a typical error of ±26.3%, with 80% of held-out values landing inside the 95% band.19742029
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 →
20254.02.15.8
20264.12.25.9
20274.12.36.0
20284.22.46.1
20294.32.46.2

Routes In Edwards Plateau

Routes recording Common 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 →
UtopiaTEXAS132024
Indian MtnTEXAS102024
RockspringTEXAS102024
LeakeyTEXAS92024
Allen CreekTEXAS92024
San SabaTEXAS42024
BoerneTEXAS32024
Dripping SpgTEXAS32024
KempnerTEXAS22024
Pidcoke 2TEXAS22024
MontellTEXAS22024
Prairie Mtn.TEXAS22024
Valley SpgsTEXAS12024
HarperTEXAS12024
LeanderTEXAS12000

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