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Species · Louisiana · BBS 2025 Release · 1966–2024

American Robin Population Trend in Louisiana

All statesForest birds

American Robin in Louisiana has surged: up 113% on the route-weighted index since 1969.

+113%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 →
56Routes 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 →
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 American Robin 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 →

American Robin has surged in Louisiana: up 113% on the route-weighted index since 1969.

American Robin Population Forecast in Louisiana

If the recent trend holds, American Robin in Louisiana is projected to fall about 19% by 2029 — from 1.1 in 2024 to a central estimate of 0.87 (95% range 0.22–1.5). A 5-year backtest shows a typical error of ±27.5%, with 100% of held-out values landing inside the 95% band.

-19%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 →
0.87Projected 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 →
0.22–1.595% 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 →
±27.5%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, American Robin in Louisiana is projected to fall about 19% by 2029 — from 1.1 in 2024 to a central estimate of 0.87 (95% range 0.22–1.5). A 5-year backtest shows a typical error of ±27.5%, 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 →
20250.860.211.5
20260.860.211.5
20270.860.221.5
20280.860.221.5
20290.870.221.5

American Robin Survey Routes in Louisiana

Routes recording American Robin 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 →
Baton Rouge3420241995
Many919921989
Mayflower720241969
Carterville419921992
Zwolle420171998
Pine Prairie419971996
Shaw320131990
Fillmore319891969
Marion319961988
De Ridder220171969
Fishville220031971
Cypress219871970
Chatham219751968
Vinton 2220222022
Trout220111988
Evelyn220232007
Enterprise220102010
Womack220122003
Rayville 2220222011
Haughton120241990
Lafitte119761976
Tensas Nwr119951992
Roseland120022002
Bickham119961996
Fort Jessup120231998

American Robin Population Trend in Other States

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

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