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

Barred Owl Population Trend in Louisiana

All statesGeneralists

Barred Owl in Louisiana has surged: up 122% on the route-weighted index since 1970.

+122%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 →
73Routes 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 →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Barred Owl 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 →

Barred Owl has surged in Louisiana: up 122% on the route-weighted index since 1970.

Barred Owl Population Forecast in Louisiana

If the recent trend holds, Barred Owl in Louisiana is projected to rise about 33% by 2029 — from 0.51 in 2024 to a central estimate of 0.68 (95% range 0.00–1.5). A 5-year backtest shows a typical error of ±20.3%, with 100% of held-out values landing inside the 95% band.

+33%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 →
0.68Projected 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 →
0.00–1.595% 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 →
±20.3%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, Barred Owl in Louisiana is projected to rise about 33% by 2029 — from 0.51 in 2024 to a central estimate of 0.68 (95% range 0.00–1.5). A 5-year backtest shows a typical error of ±20.3%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20250.680.001.5
20260.680.001.5
20270.680.001.5
20280.680.001.5
20290.680.001.5

Barred Owl Survey Routes in Louisiana

Routes recording Barred Owl 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 →
Ramah520241988
Berwick520111987
Freetown420191968
Atchafalaya420241989
Chatham319701970
Trout320232023
Hargis320112011
Mount Union320232012
Kraemer320241998
Lafitte219911971
Morgan City219861973
River Road220222004
De Ridder220141971
Rayville219941968
Clay220211968
Glencoe220141989
Maurice220091988
Brousville220232000
Kaplan220112011
De Quincy220212007
Tensas Nwr220241987
Natchez220211992
Haughton120232001
Lacombe119831971
Roseland120231995

Barred Owl Population Trend in Other States

alabamaalaskaarkansascaliforniaconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawashingtonwest-virginiawisconsin

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