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

Red Crossbill Population Trend in New Hampshire

All statesGeneralists

Red Crossbill in New Hampshire has surged: up 146% on the route-weighted index since 1971.

+146%Since 1971
15Routes In State
18Years

Notable Red Crossbill Trends in New Hampshire

long arc increasecomputed index

Red Crossbill has surged in New Hampshire: up 146% on the route-weighted index since 1971.

Red Crossbill Population Forecast in New Hampshire

If the recent trend holds, Red Crossbill in New Hampshire is projected to fall about 23% by 2029 — from 0.23 in 2024 to a central estimate of 0.17 (95% range 0.00–1.1). A 5-year backtest shows a typical error of ±67.6%, with 100% of held-out values landing inside the 95% band.

-23%Change by 2029
0.17Projected 2029 index
0.00–1.195% range
±67.6%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
20250.190.001.2
20260.180.001.1
20270.180.001.1
20280.180.001.1
20290.170.001.1

Red Crossbill Survey Routes in New Hampshire

Routes recording Red Crossbill in New Hampshire.
Jefferson Hl920151977
Walpole520232023
Stratford420192019
Concord320232023
Wilmot320231976
Mt Chocorua220241970
Milan219921973
Clarksville220031975
Dover120002000
Strafford119861986
Canterbury120242022
Marlow120242024
Franconia119861967
Dixvil Notch119751970
Glen120241976

Red Crossbill Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradogeorgiaidahoillinoismainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-mexiconew-yorknorth-carolinanorth-dakotaoregonpennsylvaniasouth-carolinasouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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