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

Ovenbird Population Trend in New Hampshire

All statesForest birds

Ovenbird in New Hampshire has edged up: up 12% on the route-weighted index since 1968.

+12%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 →
58YearsYears 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 31% by 2029 — from 16 in 2024 to a central estimate of 21 (95% range 16–25). A 5-year backtest shows a typical error of ±29.3%, with 40% of held-out values landing inside the 95% band.

+31%Change by 2029TrendPercent 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 2029 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 →
±29.3%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 31% by 2029 — from 16 in 2024 to a central estimate of 21 (95% range 16–25). A 5-year backtest shows a typical error of ±29.3%, with 40% of held-out values landing inside the 95% band.19662029
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 →
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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 →
Walpole2620241966
Jefferson Hl2620241966
Canterbury2520241966
Franconia2520241966
Lempster2420241966
Glen2420241975
Mt Chocorua2220241966
Brentwood2019981966
Fitzwilliam2020241966
Milan1820241966
Dixville Notch 21820242018
Wilmot1720241966
Jeffers Ntch1720241993
Marlow1520241966
Concord1320241966
Strafford1120241966
Crawford Not1119751966
Dixvil Notch1120171966
Stratford1020241966
Dover820241966
Hopkinton820241966
Epsom820231966
Gilmantn I W820241969
Clarksville620241966
East Kingston620241999

Ovenbird Population Trend in Other States

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

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