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

Bewick's Wren In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsForest birds

Bewick's Wren in Tamaulipan Brushlands has increased: up 25% on the route-weighted index since 1969.

+25%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 →
58YearsYears 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 42% by 2030 — from 28 in 2025 to a central estimate of 16 (95% range 4.3–28). A 5-year backtest shows a typical error of ±39.3%, with 60% of held-out values landing inside the 95% band.

-42%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 →
16Projected 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 →
4.3–2895% 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 →
±39.3%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 42% by 2030 — from 28 in 2025 to a central estimate of 16 (95% range 4.3–28). A 5-year backtest shows a typical error of ±39.3%, with 60% 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 →
2026163.928
2027164.028
2028164.128
2029164.228
2030164.328

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 →
HondoTEXAS762025
George WestTEXAS542025
Agua NuevaTEXAS432023
Millett 2TEXAS362024
El SauzTEXAS352023
Cavasara Cr.TEXAS342025
SejitaTEXAS332024
CatarinaTEXAS312010
GuerraTEXAS272025
Catarina 3TEXAS262025
EncinalTEXAS232010
DilleyTEXAS212025
Encinal 2TEXAS192025
RachalTEXAS172025
Catarina 2TEXAS172017
RandadoTEXAS132025
MillettTEXAS122012
RaymondvilleTEXAS112025
Mirando CityTEXAS102025
KingsvilleTEXAS92024
LaredoTEXAS92023
ZapataTEXAS71976
La PryorTEXAS72009
Pedro CreekTEXAS52010
San YgnacioTEXAS41985

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