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

Eastern Screech-Owl Population Trend in Iowa

All statesGeneralists

Eastern Screech-Owl in Iowa has declined: down 38% on the route-weighted index since 1974.

-38%Since 1974TrendPercent 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 →
14Routes 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 →
15YearsYears 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 IowaNotable 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 Eastern Screech-Owl in Iowa. See the full index history below.

Eastern Screech-Owl Survey Routes in Iowa

Routes recording Eastern Screech-Owl in Iowa.
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 →
Williamsburg219741974
Festina219681968
Titonka119781978
Gaza120062006
Bedford119881978
Red Rock119691969
Panther119951995
Washington119871987
Wales119881982
Maquoketa120161989
Alice119961974
Pierson120012001
Mccallsburg120022002
Davis Corner120232023

Eastern Screech-Owl Population Trend in Other States

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

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