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

Cedar Waxwing Population Trend in New Hampshire

All statesForest birds

Cedar Waxwing in New Hampshire has increased: up 33% on the route-weighted index since 1968.

+33%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 Cedar Waxwing 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 Cedar Waxwing in New Hampshire. See the full index history below.

Cedar Waxwing Population Forecast in New Hampshire

If the recent trend holds, Cedar Waxwing in New Hampshire is projected to rise about 98% by 2030 — from 7.6 in 2025 to a central estimate of 15 (95% range 8.1–22). A 5-year backtest shows a typical error of ±96.1%, with 0% of held-out values landing inside the 95% band.

+98%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 →
15Projected 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 →
8.1–2295% 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 →
±96.1%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, Cedar Waxwing in New Hampshire is projected to rise about 98% by 2030 — from 7.6 in 2025 to a central estimate of 15 (95% range 8.1–22). A 5-year backtest shows a typical error of ±96.1%, with 0% 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 →
2026157.922
2027157.922
2028158.022
2029158.022
2030158.122

Cedar Waxwing Survey Routes in New Hampshire

Routes recording Cedar Waxwing 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 →
Lempster2320251966
Wilmot2020251966
Dover1820251966
Walpole1820251966
Clarksville1820251966
Brentwood1419981966
Milan1320251966
Canterbury1220241969
Epsom1120251966
Concord1020251966
Fitzwilliam920251966
Mt Chocorua820241969
Dixvil Notch820171966
Franconia720251966
Hopkinton620251966
Crawford Not519741966
Gilmantn I W420251971
Marlow420251966
Peterborough320251967
Dixville Notch 2320252018
Stratford220251966
Glen220251975
East Kingston220221999
Jeffers Ntch220251993
Strafford120251966

Cedar Waxwing Population Trend in Other States

alabamaalaskaarkansascaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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