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

Cedar Waxwing Population Trend in New Hampshire

All statesGeneralists

Cedar Waxwing in New Hampshire has increased: up 43% on the route-weighted index since 1968.

+43%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 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 69% by 2029 — from 9.2 in 2024 to a central estimate of 16 (95% range 8.8–22). A 5-year backtest shows a typical error of ±86%, with 0% of held-out values landing inside the 95% band.

+69%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 →
16Projected 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 →
8.8–2295% 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 →
±86%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 69% by 2029 — from 9.2 in 2024 to a central estimate of 16 (95% range 8.8–22). A 5-year backtest shows a typical error of ±86%, with 0% 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 →
2025158.622
2026158.622
2027158.722
2028158.822
2029168.822

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 →
Walpole3220241966
Lempster3020241966
Clarksville2420241966
Fitzwilliam1620241966
Marlow1620241966
Franconia1520241966
Brentwood1419981966
Concord1320241966
Wilmot1320241966
Canterbury1220241969
Milan920241966
Mt Chocorua820241969
Dixvil Notch820171966
Crawford Not519741966
Stratford420231966
Dixville Notch 2420242018
Epsom320231966
Strafford320241966
Peterborough220241967
Dover220241966
Hopkinton220231966
Glen220241975
East Kingston220221999
Gilmantn I W120231971
Jefferson Hl120241966

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 2026-05-22.