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

Bewick's Wren In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsForest birds

Bewick's Wren in Tamaulipan Brushlands has edged up: up 12% on the route-weighted index since 1969.

+12%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 →
27Routes 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 Bewick's Wren in Tamaulipan Brushlands. See the full index history below.

Bewick's Wren In Tamaulipan Brushlands Population Forecast

If the recent trend holds, Bewick's Wren in Tamaulipan Brushlands is projected to fall about 39% by 2029 — from 25 in 2024 to a central estimate of 15 (95% range 3.6–27). A 5-year backtest shows a typical error of ±29.2%, with 80% of held-out values landing inside the 95% band.

-39%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 →
15Projected 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 →
3.6–2795% 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 →
±29.2%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, Bewick's Wren in Tamaulipan Brushlands is projected to fall about 39% by 2029 — from 25 in 2024 to a central estimate of 15 (95% range 3.6–27). A 5-year backtest shows a typical error of ±29.2%, with 80% 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 →
2025153.226
2026153.326
2027153.426
2028153.526
2029153.627

Routes In Tamaulipan Brushlands

Routes recording Bewick's Wren 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 →
HondoTEXAS912024
George WestTEXAS472024
Agua NuevaTEXAS432023
GuerraTEXAS412023
Millett 2TEXAS362024
El SauzTEXAS352023
SejitaTEXAS332024
CatarinaTEXAS312010
EncinalTEXAS232010
Encinal 2TEXAS222024
Mirando CityTEXAS182024
Catarina 2TEXAS172017
RachalTEXAS162023
Cavasara Cr.TEXAS152023
DilleyTEXAS132024
MillettTEXAS122012
RaymondvilleTEXAS112024
Catarina 3TEXAS112024
KingsvilleTEXAS92024
LaredoTEXAS92023
ZapataTEXAS71976
RandadoTEXAS72024
La PryorTEXAS72009
Pedro CreekTEXAS52010
San YgnacioTEXAS41985

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