BirdAnalyst
Species · New Hampshire · BBS 2025 Release · 1966–2024

Least Flycatcher Population Trend in New Hampshire

All statesAerial insectivores

Least Flycatcher in New Hampshire has collapsed: down 79% on the route-weighted index since 1968.

-79%Since 1968
26Routes In State
58Years

Notable Least Flycatcher Trends in New Hampshire

long arc declinecomputed index

Least Flycatcher has collapsed in New Hampshire: down 79% on the route-weighted index since 1968.

Least Flycatcher Population Forecast in New Hampshire

If the recent trend holds, Least Flycatcher in New Hampshire is projected to fall about 100% by 2029 — from 1.5 in 2024 to a central estimate of 0.00 (95% range 0.00–2.2). A 5-year backtest shows a typical error of ±106.5%, with 40% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–2.295% range
±106.5%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
20250.090.002.3
20260.000.002.2
20270.000.002.2
20280.000.002.2
20290.000.002.2

Least Flycatcher Survey Routes in New Hampshire

Routes recording Least Flycatcher in New Hampshire.
Crawford Not1019751966
Canterbury620241966
Mt Chocorua520241966
Fitzwilliam320241966
Hopkinton320231966
Epsom320161966
Wilmot320221966
Marlow320241966
Jefferson Hl320241966
Glen320241975
Lempster220241966
Clarksville220241966
Dixville Notch 2220242018
Peterborough120211966
Brentwood119921966
Dover120211966
Concord120221966
Strafford120221966
Gilmantn I W120161969
Walpole120241966
Franconia120231966
Milan120241966
Stratford120211966
Dixvil Notch120171966
East Kingston120171999

Least Flycatcher Population Trend in Other States

alaskaarkansascaliforniacoloradoconnecticutgeorgiaidahoillinoisindianaiowakentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanew-jerseynew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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