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

Northern Mockingbird Population Trend in Louisiana

All statesGeneralists

Northern Mockingbird in Louisiana has declined: down 35% on the route-weighted index since 1969.

-35%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 →
58YearsYears 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 2030, near 25 (95% range 18–33). A 5-year backtest shows a typical error of ±22%, with 80% of held-out values landing inside the 95% band.

+2%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 →
25Projected 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 →
18–3395% 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 2030, near 25 (95% range 18–33). A 5-year backtest shows a typical error of ±22%, with 80% 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 →
2026271934
2027261934
2028261933
2029261933
2030251833

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 27620252018
Hackberry6820161967
Brousville6820251998
Cypress6619871967
Lafitte6119911967
Bickham5720251972
River Road5520251987
Fort Polk5419751967
Ville Platte5420191988
Maurice5020241988
Fillmore4819891968
Mayflower4720251967
Derry4619891967
Many4619921989
Rayville4520081967
Gonzales4520191998
Concord4420192006
Vinton 24420252011
Esther4020251988
Gibson4020191999
Kraemer3820251997
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 2026-08-14.