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

Osprey Population Trend in New Hampshire

All statesGeneralists

Osprey in New Hampshire has surged: up 147% on the route-weighted index since 1991.

+147%Since 1991
14Routes In State
22Years

Notable Osprey Trends in New Hampshire

long arc increasecomputed index

Osprey has surged in New Hampshire: up 147% on the route-weighted index since 1991.

Osprey Population Forecast in New Hampshire

If the recent trend holds, Osprey in New Hampshire is projected to rise about 41% by 2028 — from 0.09 in 2023 to a central estimate of 0.12 (95% range 0.06–0.19). A 5-year backtest shows a typical error of ±23.4%, with 80% of held-out values landing inside the 95% band.

+41%Change by 2028
0.12Projected 2028 index
0.06–0.1995% range
±23.4%Backtest error
19742028
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
20240.120.050.18
20250.120.050.18
20260.120.050.18
20270.120.060.19
20280.120.060.19

Osprey Survey Routes in New Hampshire

Routes recording Osprey in New Hampshire.
Dover220212000
Hopkinton120232013
Epsom119911991
Concord120212016
Strafford120182018
East Kingston120172014
Mt Chocorua119971997
Walpole120131980
Lempster120222022
Jefferson Hl119741974
Milan120231994
Stratford120111998
Jeffers Ntch120162016
Clarksville120222022

Osprey Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-jerseynew-mexiconew-yorknorth-carolinaohiooregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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