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

Philadelphia Vireo Population Trend in New Hampshire

All statesForest birds

Philadelphia Vireo in New Hampshire has held roughly steady: up 9% on the route-weighted index since 1969.

+9%Since 1969
12Routes In State
25Years

Notable Philadelphia Vireo Trends in New Hampshire

No notable trend signals for Philadelphia Vireo in New Hampshire. See the full index history below.

Philadelphia Vireo Population Forecast in New Hampshire

If the recent trend holds, Philadelphia Vireo in New Hampshire is projected to stay roughly flat through 2029, near 0.07 (95% range 0.01–0.13). A 5-year backtest shows a typical error of ±37.6%, with 80% of held-out values landing inside the 95% band.

n/aChange by 2029
0.07Projected 2029 index
0.01–0.1395% range
±37.6%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
20250.070.010.13
20260.070.010.13
20270.070.010.13
20280.070.010.13
20290.070.010.13

Philadelphia Vireo Survey Routes in New Hampshire

Routes recording Philadelphia Vireo in New Hampshire.
Peterborough119841984
Concord119891989
Wilmot119841984
Mt Chocorua120242021
Crawford Not119741967
Jefferson Hl120231969
Franconia119811981
Milan120171967
Stratford119791979
Dixvil Notch119761972
Clarksville120232015
Jeffers Ntch120041994

Philadelphia Vireo Population Trend in Other States

alabamamainemichiganminnesotanew-yorknorth-dakotavermontwisconsin

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