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

Northern Mockingbird Population Trend in New Hampshire

All statesGeneralists

Northern Mockingbird in New Hampshire has surged: up 856% on the route-weighted index since 1969.

+856%Since 1969TrendPercent 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 →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Northern Mockingbird 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 increasecomputed 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 →

Northern Mockingbird has surged in New Hampshire: up 856% on the route-weighted index since 1969.

Northern Mockingbird Population Forecast in New Hampshire

If the recent trend holds, Northern Mockingbird in New Hampshire is projected to rise about 85% by 2029 — from 0.46 in 2024 to a central estimate of 0.84 (95% range 0.00–2.1). A 5-year backtest shows a typical error of ±167.9%, with 100% of held-out values landing inside the 95% band.

+85%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 →
0.84Projected 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 →
0.00–2.195% 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 →
±167.9%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, Northern Mockingbird in New Hampshire is projected to rise about 85% by 2029 — from 0.46 in 2024 to a central estimate of 0.84 (95% range 0.00–2.1). A 5-year backtest shows a typical error of ±167.9%, with 100% of held-out values landing inside the 95% band.19672029
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 →
20250.840.002.1
20260.840.002.1
20270.840.002.1
20280.840.002.1
20290.840.002.1

Northern Mockingbird Survey Routes in New Hampshire

Routes recording Northern Mockingbird 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 →
Marlow1020071980
Brentwood919981972
Concord520241970
Clarksville420011971
Glen320081981
Peterborough220241977
Epsom220231978
Gilmantn I W220101979
East Kingston220241999
Fitzwilliam120131975
Dover120241967
Hopkinton119951976
Strafford120221979
Canterbury120181987
Wilmot120232003
Mt Chocorua120232000
Walpole120141976
Lempster119921980
Jefferson Hl120161991
Franconia120191989
Milan120031984
Stratford120232001
Dixvil Notch119991994
Jeffers Ntch120062006

Northern Mockingbird Population Trend in Other States

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

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