BirdAnalyst
Species · BCR 36 · BBS 2025 Release · 1966–2024

Turkey Vulture In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsGeneralists

Turkey Vulture in Tamaulipan Brushlands has held roughly steady: down 6% on the route-weighted index since 1969.

-6%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 →
28Routes 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 Turkey Vulture in Tamaulipan Brushlands. See the full index history below.

Turkey Vulture In Tamaulipan Brushlands Population Forecast

If the recent trend holds, Turkey Vulture in Tamaulipan Brushlands is projected to rise about 43% by 2029 — from 14 in 2024 to a central estimate of 20 (95% range 10–30). A 5-year backtest shows a typical error of ±37.9%, with 100% of held-out values landing inside the 95% band.

+43%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 →
20Projected 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 →
10–3095% 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 →
±37.9%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, Turkey Vulture in Tamaulipan Brushlands is projected to rise about 43% by 2029 — from 14 in 2024 to a central estimate of 20 (95% range 10–30). A 5-year backtest shows a typical error of ±37.9%, 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 →
20252010.029
2026201030
2027201030
2028201030
2029201030

Routes In Tamaulipan Brushlands

Routes recording Turkey Vulture in Tamaulipan Brushlands.
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 →
ZapataTEXAS471987
EncinalTEXAS432010
Millett 2TEXAS352024
Encinal 2TEXAS292024
Agua NuevaTEXAS272023
Catarina 2TEXAS272017
GuerraTEXAS272023
Catarina 3TEXAS252024
MillettTEXAS242012
George WestTEXAS212024
LaredoTEXAS212023
SejitaTEXAS192024
CatarinaTEXAS172010
HondoTEXAS162024
Cavasara Cr.TEXAS162023
RachalTEXAS152023
El SauzTEXAS142023
ProgresoTEXAS132011
La PryorTEXAS122017
RandadoTEXAS112023
KingsvilleTEXAS82024
El IndioTEXAS82007
San YgnacioTEXAS61985
Pedro CreekTEXAS62010
Mirando CityTEXAS52024

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