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

Least Flycatcher Population Trend in Idaho

All statesAerial insectivores

Least Flycatcher in Idaho has surged: up 170% on the route-weighted index since 1991.

+170%Since 1991
14Routes In State
28Years

Notable Least Flycatcher Trends in Idaho

long arc increasecomputed index

Least Flycatcher has surged in Idaho: up 170% on the route-weighted index since 1991.

Least Flycatcher Population Forecast in Idaho

If the recent trend holds, Least Flycatcher in Idaho is projected to fall about 25% by 2029 — from 0.24 in 2024 to a central estimate of 0.18 (95% range 0.00–0.42). A 5-year backtest shows a typical error of ±69.6%, with 60% of held-out values landing inside the 95% band.

-25%Change by 2029
0.18Projected 2029 index
0.00–0.4295% range
±69.6%Backtest error
19792029
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
20250.170.000.41
20260.170.000.41
20270.170.000.42
20280.180.000.42
20290.180.000.42

Least Flycatcher Survey Routes in Idaho

Routes recording Least Flycatcher in Idaho.
Yellow Pine719931992
Naples620241979
Magic Mtn619901990
Lolo Pass220191992
Baker220102010
Burgdorf219921992
Featherville219961991
Mivoden120232023
Gifford120172017
Joel120232017
Challis120092001
Leadore120122012
Cobalt120072007
Coolin120232003

Least Flycatcher Population Trend in Other States

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

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