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

Baltimore Oriole Population Trend in New Hampshire

All statesForest birds

Baltimore Oriole in New Hampshire has fallen sharply: down 68% on the route-weighted index since 1968.

-68%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 →
24Routes 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 Baltimore Oriole 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 →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Baltimore Oriole has fallen sharply in New Hampshire: down 68% on the route-weighted index since 1968.

Baltimore Oriole Population Forecast in New Hampshire

If the recent trend holds, Baltimore Oriole in New Hampshire is projected to fall about 12% by 2030 — from 1.3 in 2025 to a central estimate of 1.2 (95% range 0.00–4.1). A 5-year backtest shows a typical error of ±22.9%, with 100% of held-out values landing inside the 95% band.

-12%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 →
1.2Projected 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 →
0.00–4.195% 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 →
±22.9%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, Baltimore Oriole in New Hampshire is projected to fall about 12% by 2030 — from 1.3 in 2025 to a central estimate of 1.2 (95% range 0.00–4.1). A 5-year backtest shows a typical error of ±22.9%, with 100% 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 →
20261.60.004.5
20271.50.004.4
20281.40.004.3
20291.30.004.2
20301.20.004.1

Baltimore Oriole Survey Routes in New Hampshire

Routes recording Baltimore Oriole 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 →
Fitzwilliam520251966
Dover520251966
East Kingston520251999
Concord420251966
Epsom220251966
Canterbury220251966
Mt Chocorua220251967
Walpole220251966
Jefferson Hl220221966
Peterborough120251966
Brentwood119981966
Hopkinton120231966
Strafford120251966
Gilmantn I W120181969
Wilmot120131966
Marlow120251966
Lempster120251967
Franconia120231966
Milan120211966
Stratford120151967
Dixvil Notch120001969
Clarksville119871967
Glen120221975
Jeffers Ntch120182000

Baltimore Oriole Population Trend in Other States

alabamaarkansascaliforniacoloradoconnecticutdelawaregeorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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