BirdAnalyst
Species · BCR 36 · BBS 2026 Release · 1966–2025

White-tailed Hawk In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsBirds of prey

White-tailed Hawk in Tamaulipan Brushlands has edged down: down 18% on the route-weighted index since 1970.

-18%Since 1970TrendPercent 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 →
12Routes 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 →
49YearsYears 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 White-tailed Hawk in Tamaulipan Brushlands. See the full index history below.

White-tailed Hawk In Tamaulipan Brushlands Population Forecast

If the recent trend holds, White-tailed Hawk in Tamaulipan Brushlands is projected to rise about 127% by 2030 — from 0.18 in 2025 to a central estimate of 0.41 (95% range 0.00–0.85). A 5-year backtest shows a typical error of ±159.1%, with 100% of held-out values landing inside the 95% band.

+127%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 →
0.41Projected 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 →
0.00–0.8595% 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 →
±159.1%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, White-tailed Hawk in Tamaulipan Brushlands is projected to rise about 127% by 2030 — from 0.18 in 2025 to a central estimate of 0.41 (95% range 0.00–0.85). A 5-year backtest shows a typical error of ±159.1%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20260.410.000.84
20270.410.000.84
20280.410.000.85
20290.410.000.85
20300.410.000.85

Routes In Tamaulipan Brushlands

Routes recording White-tailed Hawk 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 →
George WestTEXAS41990
SejitaTEXAS32024
GuerraTEXAS21990
RachalTEXAS12025
Agua NuevaTEXAS12023
KingsvilleTEXAS12024
RandadoTEXAS12023
RaymondvilleTEXAS12025
El SauzTEXAS12013
ProgresoTEXAS12010
HeidelbergTEXAS12022
Millett 2TEXAS12016

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