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

House Finch In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsGeneralists

House Finch in Tamaulipan Brushlands has surged: up 802% on the route-weighted index since 1970.

+802%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 →
19Routes 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 →
51YearsYears 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 →

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 →

House Finch has surged in Tamaulipan Brushlands: up 802% on the route-weighted index since 1970.

House Finch In Tamaulipan Brushlands Population Forecast

If the recent trend holds, House Finch in Tamaulipan Brushlands is projected to stay roughly flat through 2030, near 2.3 (95% range 0.00–5.7). A 5-year backtest shows a typical error of ±29.1%, with 100% of held-out values landing inside the 95% band.

-3%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 →
2.3Projected 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 →
0.00–5.795% 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 →
±29.1%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, House Finch in Tamaulipan Brushlands is projected to stay roughly flat through 2030, near 2.3 (95% range 0.00–5.7). A 5-year backtest shows a typical error of ±29.1%, with 100% 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 →
20262.20.005.5
20272.20.005.6
20282.20.005.6
20292.30.005.6
20302.30.005.7

Routes In Tamaulipan Brushlands

Routes recording House Finch 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 →
La PryorTEXAS92017
HondoTEXAS82025
George WestTEXAS72025
MillettTEXAS72012
Catarina 3TEXAS62024
Pedro CreekTEXAS62005
RandadoTEXAS52025
Agua NuevaTEXAS42007
Catarina 2TEXAS32017
DilleyTEXAS32025
LaredoTEXAS32016
Millett 2TEXAS22024
Cavasara Cr.TEXAS22025
KingsvilleTEXAS12007
Mirando CityTEXAS12025
EncinalTEXAS12010
CatarinaTEXAS12004
El IndioTEXAS12001
Encinal 2TEXAS12019

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