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

Willow Flycatcher Population Trend in Connecticut

All statesAerial insectivores

Willow Flycatcher in Connecticut has increased: up 30% on the route-weighted index since 1969.

+30%Since 1969
17Routes In State
55Years

Notable Willow Flycatcher Trends in Connecticut

No notable trend signals for Willow Flycatcher in Connecticut. See the full index history below.

Willow Flycatcher Population Forecast in Connecticut

If the recent trend holds, Willow Flycatcher in Connecticut is projected to rise about 36% by 2029 — from 0.56 in 2024 to a central estimate of 0.76 (95% range 0.05–1.5). A 5-year backtest shows a typical error of ±404%, with 40% of held-out values landing inside the 95% band.

+36%Change by 2029
0.76Projected 2029 index
0.05–1.595% range
±404%Backtest error
19672029
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
20250.730.031.4
20260.740.041.4
20270.750.041.4
20280.750.051.5
20290.760.051.5

Willow Flycatcher Survey Routes in Connecticut

Routes recording Willow Flycatcher in Connecticut.
Warren420111974
Granby420241988
New Hartford319871973
Sherman220181982
Danbury220171968
Mystic120231989
Buckingham120152002
Uncasville120231997
Woodstock120051969
Westbrook119931990
Willimantic120051977
No Woodbury120241967
New Hartford119941994
Long Hill120191974
Mid Haddam120082008
Southington120191979
Woodstock 2120192017

Willow Flycatcher Population Trend in Other States

alaskaarizonaarkansascaliforniacoloradodelawaregeorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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