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Species · BCR 19 · BBS 2026 Release · 1966–2025

Common Raven In Central Mixed Grass Prairie

All regionsCentral Mixed Grass PrairieGeneralists

Common Raven in Central Mixed Grass Prairie has edged down: down 21% on the route-weighted index since 1969.

-21%Since 1969TrendPercent 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 →
10Routes 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 →
38YearsYears 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 Common Raven in Central Mixed Grass Prairie. See the full index history below.

Common Raven In Central Mixed Grass Prairie Population Forecast

If the recent trend holds, Common Raven in Central Mixed Grass Prairie is projected to fall about 69% by 2030 — from 0.18 in 2025 to a central estimate of 0.06 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±31.7%, with 80% of held-out values landing inside the 95% band.

-69%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 →
0.06Projected 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 →
0.00–0.1495% 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 →
±31.7%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 Central Mixed Grass Prairie is projected to fall about 69% by 2030 — from 0.18 in 2025 to a central estimate of 0.06 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±31.7%, with 80% of held-out values landing inside the 95% band.19672030
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 →
20260.060.000.14
20270.060.000.14
20280.060.000.14
20290.060.000.14
20300.060.000.14

Routes In Central Mixed Grass Prairie

Routes recording Common Raven in Central Mixed Grass 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 →
Pear ValleyTEXAS52025
GraybackTEXAS51969
Mertzon 2TEXAS52025
WeinertTEXAS41969
MertzonTEXAS32011
Shields 2TEXAS32025
EldoradoTEXAS22022
SilverTEXAS22024
WinchellTEXAS12023
BookerTEXAS12023

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