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

Least Flycatcher Population Trend in Iowa

All statesAerial insectivores

Least Flycatcher in Iowa has held roughly steady: down 4% on the route-weighted index since 1970.

-4%Since 1970
23Routes In State
33Years

Notable Least Flycatcher Trends in Iowa

No notable trend signals for Least Flycatcher in Iowa. See the full index history below.

Least Flycatcher Population Forecast in Iowa

If the recent trend holds, Least Flycatcher in Iowa is projected to stay roughly flat through 2019, near 0.04 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±20.6%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2019
0.04Projected 2019 index
0.00–0.1495% range
±20.6%Backtest error
19682019
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20150.040.000.14
20160.040.000.14
20170.040.000.14
20180.040.000.14
20190.040.000.14

Least Flycatcher Survey Routes in Iowa

Routes recording Least Flycatcher in Iowa.
Exline219961987
Bedford219721972
Pierson219761976
Garner219751975
Mt Hamill119911974
College Spgs119691969
Desmoines119721970
Panther119731973
Washington119921975
Neola119921992
Wales119741974
Maquoketa120141969
Alice119781969
Prairieburg119761975
Hudson119791979
Scranton119761976
Clare120132007
Washta120081968
Sioux City120092009
Festina119931993
Titonka119811976
Gaza120021979
Rock Valley119721972

Least Flycatcher Population Trend in Other States

alaskaarkansascaliforniacoloradoconnecticutgeorgiaidahoillinoisindianakentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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