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

Rock Pigeon Population Trend in New Hampshire

All statesGeneralists

Rock Pigeon in New Hampshire has declined: down 39% on the route-weighted index since 1968.

-39%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 →
22Routes 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 Rock Pigeon 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 Rock Pigeon in New Hampshire. See the full index history below.

Rock Pigeon Population Forecast in New Hampshire

If the recent trend holds, Rock Pigeon in New Hampshire is projected to rise about 61% by 2029 — from 1.7 in 2024 to a central estimate of 2.7 (95% range 0.00–5.4). A 5-year backtest shows a typical error of ±61%, with 100% of held-out values landing inside the 95% band.

+61%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 →
2.7Projected 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 →
0.00–5.495% 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 →
±61%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, Rock Pigeon in New Hampshire is projected to rise about 61% by 2029 — from 1.7 in 2024 to a central estimate of 2.7 (95% range 0.00–5.4). A 5-year backtest shows a typical error of ±61%, with 100% 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 →
20252.80.055.5
20262.80.035.5
20272.70.015.5
20282.70.005.5
20292.70.005.4

Rock Pigeon Survey Routes in New Hampshire

Routes recording Rock Pigeon 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 →
Glen1820241976
Jefferson Hl1020241975
Franconia920231970
Strafford819901980
Lempster820191966
East Kingston820082008
Wilmot620221966
Milan520221966
Peterborough320241968
Fitzwilliam320241966
Gilmantn I W320221985
Marlow320231970
Canterbury220151970
Stratford220231966
Dixvil Notch220051970
Brentwood119951966
Dover120231966
Hopkinton120241977
Epsom120191966
Concord120241966
Mt Chocorua120241968
Walpole120181967

Rock Pigeon Population Trend in Other States

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

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