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

Ring-necked Pheasant Population Trend in New Hampshire

All statesGrassland birds

Ring-necked Pheasant in New Hampshire has fallen sharply: down 66% on the route-weighted index since 1969.

-66%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 →
15Routes 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 →
26YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Ring-necked Pheasant 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 →

Ring-necked Pheasant has fallen sharply in New Hampshire: down 66% on the route-weighted index since 1969.

Ring-necked Pheasant Population Forecast in New Hampshire

If the recent trend holds, Ring-necked Pheasant in New Hampshire is projected to fall about 100% by 2019 — from 0.14 in 2014 to a central estimate of 0.00 (95% range 0.00–0.29). A 5-year backtest shows a typical error of ±212.3%, with 80% of held-out values landing inside the 95% band.

-100%Change by 2019TrendPercent 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 →
0.00Projected 2019 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.2995% 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 →
±212.3%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, Ring-necked Pheasant in New Hampshire is projected to fall about 100% by 2019 — from 0.14 in 2014 to a central estimate of 0.00 (95% range 0.00–0.29). A 5-year backtest shows a typical error of ±212.3%, with 80% of held-out values landing inside the 95% band.19662019
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 →
20150.000.000.29
20160.000.000.29
20170.000.000.29
20180.000.000.29
20190.000.000.29

Ring-necked Pheasant Survey Routes in New Hampshire

Routes recording Ring-necked Pheasant 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 →
Dover519721967
Peterborough120141972
Brentwood119921966
Fitzwilliam119991969
Hopkinton119801972
Epsom119801967
East Kingston120002000
Strafford119751969
Mt Chocorua119841984
Walpole119991973
Marlow119801980
Lempster120141978
Crawford Not119711970
Milan120141992
Stratford119921969

Ring-necked Pheasant Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutdelawareidahoillinoisindianaiowakansasmainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-jerseynew-mexiconew-yorknorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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