BirdAnalyst
Species · New Hampshire · BBS 2026 Release · 1966–2025

Ovenbird Population Trend in New Hampshire

All statesForest birds

Ovenbird in New Hampshire has edged up: up 10% on the route-weighted index since 1968.

+10%Since 1968TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
26Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
59YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Ovenbird Trends in New HampshireNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

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

Ovenbird Population Forecast in New Hampshire

If the recent trend holds, Ovenbird in New Hampshire is projected to rise about 22% by 2030 — from 17 in 2025 to a central estimate of 21 (95% range 16–25). A 5-year backtest shows a typical error of ±32.7%, with 20% of held-out values landing inside the 95% band.

+22%Change by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
21Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
16–2595% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±32.7%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Ovenbird in New Hampshire is projected to rise about 22% by 2030 — from 17 in 2025 to a central estimate of 21 (95% range 16–25). A 5-year backtest shows a typical error of ±32.7%, with 20% of held-out values landing inside the 95% band.19662030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
2026201625
2027201625
2028201625
2029211625
2030211625

Ovenbird Survey Routes in New Hampshire

Routes recording Ovenbird in New Hampshire.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Wilmot2920251966
Walpole2920251966
Glen2820251975
Canterbury2720251966
Franconia2620251966
Fitzwilliam2520251966
Marlow2320251966
Mt Chocorua2220251966
Brentwood2019981966
Epsom1920251966
Dixville Notch 21920252018
Hopkinton1620251966
Jeffers Ntch1520251993
Milan1420251966
Concord1320251966
Strafford1220251966
Lempster1220251966
Jefferson Hl1220251966
Gilmantn I W1120251969
Crawford Not1119751966
Stratford1120251966
Dixvil Notch1120171966
Clarksville920251966
Dover720251966
East Kingston520251999

Ovenbird Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawaregeorgiaillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseeutahvermontvirginiawest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.