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

Least Flycatcher Population Trend in Maine

All statesAerial insectivores

Least Flycatcher in Maine has fallen sharply: down 60% on the route-weighted index since 1968.

-60%Since 1968
78Routes In State
58Years

Notable Least Flycatcher Trends in Maine

long arc declinecomputed index

Least Flycatcher has fallen sharply in Maine: down 60% on the route-weighted index since 1968.

Least Flycatcher Population Forecast in Maine

If the recent trend holds, Least Flycatcher in Maine is projected to rise about 68% by 2029 — from 1.1 in 2024 to a central estimate of 1.8 (95% range 0.00–4.6). A 5-year backtest shows a typical error of ±133.8%, with 100% of held-out values landing inside the 95% band.

+68%Change by 2029
1.8Projected 2029 index
0.00–4.695% range
±133.8%Backtest error
19662029
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
20251.90.004.8
20261.90.004.8
20271.90.004.7
20281.80.004.7
20291.80.004.6

Least Flycatcher Survey Routes in Maine

Routes recording Least Flycatcher in Maine.
Nesowadnehun2020211990
Warren1319901973
Horse Mtn1320111983
Manchester719951971
Baxter719881977
Washburn720051979
Bowdoin Ctr620131975
Benton619801971
Seboomook Lk620141972
St David620051982
Waite519771977
Baker Lake520091994
Clayton Lake 2520112010
Andover520212010
Reeds420241990
Northfield419811976
Forest Sta420001966
Jefferson420081991
Wilson Mills320241983
Winn320211969
Clayton Lake320081977
Ludlow319981968
Weeks Brook320161995
Telos320061995
Yankeetuladi320091994

Least Flycatcher Population Trend in Other States

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

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