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

Boreal Chickadee Population Trend in New Hampshire

All statesForest birds

Boreal Chickadee in New Hampshire has collapsed: down 81% on the route-weighted index since 1968.

-81%Since 1968
6Routes In State
27Years

Notable Boreal Chickadee Trends in New Hampshire

long arc declinecomputed index

Boreal Chickadee has collapsed in New Hampshire: down 81% on the route-weighted index since 1968.

Boreal Chickadee Population Forecast in New Hampshire

If the recent trend holds, Boreal Chickadee in New Hampshire is projected to stay roughly flat through 2027, near 0.06 (95% range 0.00–0.27). A 5-year backtest shows a typical error of ±47.3%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2027
0.06Projected 2027 index
0.00–0.2795% range
±47.3%Backtest error
19662027
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
20230.070.000.27
20240.070.000.27
20250.070.000.27
20260.060.000.27
20270.060.000.27

Boreal Chickadee Survey Routes in New Hampshire

Routes recording Boreal Chickadee in New Hampshire.
Crawford Not219721972
Milan119961967
Stratford120042004
Dixvil Notch120031966
Clarksville120131969
Jeffers Ntch120222007

Boreal Chickadee Population Trend in Other States

alaskamainemichiganminnesotamontananew-yorkvermontwisconsin

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