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

House Finch In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsGeneralists

House Finch in Tamaulipan Brushlands has surged: up 818% on the route-weighted index since 1970.

+818%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 →
50YearsYears 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 818% 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 fall about 40% by 2029 — from 3.8 in 2024 to a central estimate of 2.2 (95% range 0.00–5.7). A 5-year backtest shows a typical error of ±138.3%, with 100% of held-out values landing inside the 95% band.

-40%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 →
2.2Projected 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 →
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 →
±138.3%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, House Finch in Tamaulipan Brushlands is projected to fall about 40% by 2029 — from 3.8 in 2024 to a central estimate of 2.2 (95% range 0.00–5.7). A 5-year backtest shows a typical error of ±138.3%, 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 →
20252.10.005.5
20262.10.005.6
20272.20.005.6
20282.20.005.6
20292.20.005.7

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 →
Mirando CityTEXAS172024
HondoTEXAS152024
La PryorTEXAS92017
MillettTEXAS72012
Catarina 3TEXAS62024
Pedro CreekTEXAS62005
Agua NuevaTEXAS42007
George WestTEXAS42024
RandadoTEXAS32022
Catarina 2TEXAS32017
LaredoTEXAS32016
Millett 2TEXAS22024
KingsvilleTEXAS12007
EncinalTEXAS12010
CatarinaTEXAS12004
El IndioTEXAS12001
DilleyTEXAS12024
Encinal 2TEXAS12019
Cavasara Cr.TEXAS12023

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