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Species · Louisiana · BBS 2025 Release · 1966–2024

Eastern Screech-Owl Population Trend in Louisiana

All statesGeneralists

Eastern Screech-Owl in Louisiana has fallen sharply: down 51% on the route-weighted index since 1972.

-51%Since 1972TrendPercent 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 →
18Routes 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 →
22YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Eastern Screech-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 declinecomputed 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 →

Eastern Screech-Owl has fallen sharply in Louisiana: down 51% on the route-weighted index since 1972.

Eastern Screech-Owl Population Forecast in Louisiana

If the recent trend holds, Eastern Screech-Owl in Louisiana is projected to fall about 86% by 2017 — from 0.06 in 2012 to a central estimate of 0.01 (95% range 0.00–0.21). A 5-year backtest shows a typical error of ±45%, with 100% of held-out values landing inside the 95% band.

-86%Change by 2017TrendPercent 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 →
0.01Projected 2017 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.2195% 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 →
±45%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, Eastern Screech-Owl in Louisiana is projected to fall about 86% by 2017 — from 0.06 in 2012 to a central estimate of 0.01 (95% range 0.00–0.21). A 5-year backtest shows a typical error of ±45%, with 100% of held-out values landing inside the 95% band.19682017
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 →
20130.020.000.22
20140.020.000.22
20150.010.000.22
20160.010.000.21
20170.010.000.21

Eastern Screech-Owl Survey Routes in Louisiana

Routes recording Eastern Screech-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 →
Trout319881988
Slidell219871984
Ivan220122012
Fishville219921972
Cheniere219841984
Greensburg120112011
Freetown119961996
Tensas Nwr119921992
Atchafalaya119981998
Bickham119901989
Plettenberg119841984
Goodwill120052005
Pearl River119951994
Derry119711968
Derry 2120022002
Mer Rouge120012001
Clay120111983
Rayville 2120122010

Eastern Screech-Owl Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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