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Species · Delaware · BBS 2026 Release · 1966–2025

Red-bellied Woodpecker Population Trend in Delaware

All statesForest birds

Red-bellied Woodpecker in Delaware has surged: up 185% on the route-weighted index since 1968.

+185%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 →
17Routes 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 Red-bellied Woodpecker Trends in DelawareNotable 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 →

Red-bellied Woodpecker has surged in Delaware: up 185% on the route-weighted index since 1968.

Red-bellied Woodpecker Population Forecast in Delaware

If the recent trend holds, Red-bellied Woodpecker in Delaware is projected to fall about 34% by 2030 — from 16 in 2025 to a central estimate of 11 (95% range 5.9–15). A 5-year backtest shows a typical error of ±32.6%, with 40% of held-out values landing inside the 95% band.

-34%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 →
11Projected 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 →
5.9–1595% 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 →
±32.6%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, Red-bellied Woodpecker in Delaware is projected to fall about 34% by 2030 — from 16 in 2025 to a central estimate of 11 (95% range 5.9–15). A 5-year backtest shows a typical error of ±32.6%, with 40% 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 →
2026105.615
2027105.615
2028105.715
2029105.815
2030115.915

Red-bellied Woodpecker Survey Routes in Delaware

Routes recording Red-bellied Woodpecker in Delaware.
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 →
Harrington2720251966
Frederica2220251966
Pepperbox 22020252017
Milton 21520252017
Milton1120161966
Blackbird920251994
Pepperbox820161998
Mt Pleasant720191966
Frankford520121966
Holleyville520041966
Dover419871966
Wilmington320141966
Bethany Bch319861967
Millsboro320252017
Lowes Xrds219911966
Holleyville 2220242006
Georgetown220221992

Red-bellied Woodpecker Population Trend in Other States

alabamaarkansasconnecticutfloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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