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

Barred Owl Population Trend in Alabama

All statesGeneralists

Barred Owl in Alabama has risen sharply: up 66% on the route-weighted index since 1968.

+66%Since 1968TrendPercent 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 →
94Routes 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 Barred Owl Trends in AlabamaNotable 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 risen sharply in Alabama: up 66% on the route-weighted index since 1968.

Barred Owl Population Forecast in Alabama

If the recent trend holds, Barred Owl in Alabama is projected to stay roughly flat through 2029, near 0.35 (95% range 0.13–0.57). A 5-year backtest shows a typical error of ±25.8%, with 100% of held-out values landing inside the 95% band.

+4%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 →
0.35Projected 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 →
0.13–0.5795% 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 →
±25.8%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 Alabama is projected to stay roughly flat through 2029, near 0.35 (95% range 0.13–0.57). A 5-year backtest shows a typical error of ±25.8%, with 100% of held-out values landing inside the 95% band.19662029
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 →
20250.340.120.56
20260.340.120.56
20270.340.120.56
20280.340.120.56
20290.350.130.57

Barred Owl Survey Routes in Alabama

Routes recording Barred Owl in Alabama.
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 →
Brantley420141987
Valhermoso Spg 2420142014
Vina420182000
Gainestown Ferry420151999
Warrior Std320241969
Claiborne320061996
Chacaloochee Bay320172009
Swaim220241966
Howard220141966
Sprague220241994
Cottonton220241977
South220111984
Castleberry219991972
Millry220061977
Foley219751971
Jena220141982
Escatawpa220231983
Courtland220051999
Borden Springs 2220242003
Autaugaville220111997
Eufaula220172017
St. Elmo220172017
St Florian120191979
Hillsboro119961977
Trade120221968

Barred Owl Population Trend in Other States

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

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