BirdAnalyst
Species · Texas · BBS 2025 Release · 1966–2024

Common Raven Population Trend in Texas

All statesGeneralists

Common Raven in Texas has surged: up 343% on the route-weighted index since 1969.

+343%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 →
59Routes In StateSurvey 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 Common Raven Trends in TexasNotable 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 Texas: up 343% on the route-weighted index since 1969.

Common Raven Population Forecast in Texas

If the recent trend holds, Common Raven in Texas is projected to rise about 20% by 2029 — from 0.56 in 2024 to a central estimate of 0.67 (95% range 0.41–0.92). A 5-year backtest shows a typical error of ±12.2%, with 100% of held-out values landing inside the 95% band.

+20%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 →
0.67Projected 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 →
0.41–0.9295% 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 →
±12.2%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 Texas is projected to rise about 20% by 2029 — from 0.56 in 2024 to a central estimate of 0.67 (95% range 0.41–0.92). A 5-year backtest shows a typical error of ±12.2%, with 100% of held-out values landing inside the 95% band.19672029
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 →
20250.630.370.89
20260.640.380.90
20270.650.390.90
20280.660.400.91
20290.670.410.92

Common Raven Survey Routes in Texas

Routes recording Common Raven in Texas.
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 →
Plains2719771972
Utopia1320241984
Rockspring1020241995
Indian Mtn1020241977
Leakey920241994
Allen Creek920241994
Ft. Davis520232004
Grayback519691969
San Saba420241988
Bear Mtn420191988
Weinert419691969
Van Horn320242017
Dripping Spg320241993
Boerne320241988
Albany320221969
Devils R Cyn320242009
Mertzon320111967
Altuda320231969
Valentine319861972
Dougherty320222012
Ozona320221975
Chisos Basin220241995
Marathon220232006
Pidcoke 2220242024
Kempner220241999

Common Raven Population Trend in Other States

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