BirdAnalyst
Species · Louisiana · BBS 2025 Release · 1966–2024

Northern Mockingbird Population Trend in Louisiana

All statesGeneralists

Northern Mockingbird in Louisiana has declined: down 37% on the route-weighted index since 1969.

-37%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 →
100Routes 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 Northern Mockingbird 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 →

No notable trend signals for Northern Mockingbird in Louisiana. See the full index history below.

Northern Mockingbird Population Forecast in Louisiana

If the recent trend holds, Northern Mockingbird in Louisiana is projected to stay roughly flat through 2029, near 26 (95% range 19–33). A 5-year backtest shows a typical error of ±22%, with 80% of held-out values landing inside the 95% band.

-6%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 →
26Projected 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 →
19–3395% 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 →
±22%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, Northern Mockingbird in Louisiana is projected to stay roughly flat through 2029, near 26 (95% range 19–33). A 5-year backtest shows a typical error of ±22%, with 80% 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 →
2025272034
2026272034
2027271934
2028261934
2029261933

Northern Mockingbird Survey Routes in Louisiana

Routes recording Northern Mockingbird 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 →
Mamou11919821967
Keystone11420131967
Carlisle9119881968
Hackberry 27820242018
Hackberry6820161967
River Road6820241987
Cypress6619871967
Brousville6520241998
Lafitte6119911967
Fort Polk5419751967
Ville Platte5420191988
Esther5120241988
Maurice5020241988
Fillmore4819891968
Mayflower4620241967
Derry4619891967
Many4619921989
Rayville4520081967
Gonzales4520191998
Rayville 24420242009
Concord4420192006
Baton Rouge4220241995
Roseland4020241967
Gibson4020191999
Ltl Chenier 23820112010

Northern Mockingbird Population Trend in Other States

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

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