BirdAnalyst
Species · Louisiana · BBS 2026 Release · 1966–2025

House Finch Population Trend in Louisiana

All statesGeneralists

House Finch in Louisiana has risen sharply: up 63% on the route-weighted index since 1998.

+63%Since 1998TrendPercent 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 →
45Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
29YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable House Finch Trends in LouisianaNotable 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 risen sharply in Louisiana: up 63% on the route-weighted index since 1998.

House Finch Population Forecast in Louisiana

If the recent trend holds, House Finch in Louisiana is projected to rise about 43% by 2030 — from 0.36 in 2025 to a central estimate of 0.51 (95% range 0.22–0.81). A 5-year backtest shows a typical error of ±27%, with 100% of held-out values landing inside the 95% band.

+43%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 →
0.51Projected 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 →
0.22–0.8195% 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 →
±27%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 Louisiana is projected to rise about 43% by 2030 — from 0.36 in 2025 to a central estimate of 0.51 (95% range 0.22–0.81). A 5-year backtest shows a typical error of ±27%, with 100% of held-out values landing inside the 95% band.19962030
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 →
20260.500.200.79
20270.500.210.79
20280.510.210.80
20290.510.220.80
20300.510.220.81

House Finch Survey Routes in Louisiana

Routes recording House Finch in Louisiana.
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 →
Keystone1520081996
Baton Rouge620251996
Concord520192019
Mayflower420222013
Belair420192019
Evelyn320142005
Bickham220152001
Longstreet220252016
Franklinton220172008
Ramah220252025
Trout220132009
De Quincy220142014
Zwolle220232003
Womack220152004
Ville Platte220192019
Delhi220172017
Cheniere220242010
Haughton120242005
Freetown119991999
River Road120182002
Roseland120252002
Fort Jessup120232003
Linville120252010
De Ridder120132004
Fishville120162003

House Finch Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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