BirdAnalyst
Species · Maryland · BBS 2026 Release · 1966–2025

Red-headed Woodpecker Population Trend in Maryland

All statesForest birds

Red-headed Woodpecker in Maryland has surged: up 42× on the route-weighted index since 1968.

42×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 →
51Routes 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-headed Woodpecker Trends in MarylandNotable 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 Red-headed Woodpecker in Maryland. See the full index history below.

Red-headed Woodpecker Population Forecast in Maryland

If the recent trend holds, Red-headed Woodpecker in Maryland is projected to fall about 54% by 2030 — from 2.5 in 2025 to a central estimate of 1.2 (95% range 0.53–1.8). A 5-year backtest shows a typical error of ±47.6%, with 20% of held-out values landing inside the 95% band.

-54%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 →
1.2Projected 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 →
0.53–1.895% 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 →
±47.6%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-headed Woodpecker in Maryland is projected to fall about 54% by 2030 — from 2.5 in 2025 to a central estimate of 1.2 (95% range 0.53–1.8). A 5-year backtest shows a typical error of ±47.6%, with 20% 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 →
20261.10.451.7
20271.10.471.7
20281.10.491.8
20291.10.511.8
20301.20.531.8

Red-headed Woodpecker Survey Routes in Maryland

Routes recording Red-headed Woodpecker in Maryland.
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 →
Emmitsburg2320251970
Madison2120251984
Honga1420251975
Cokesbury1420251977
Eklo920181982
Williamsport620251966
Davidsnville520251984
Olney420251978
Pleasant Val320241989
Vindex220241966
Warfieldsbrg220251971
Berlin220241980
Tall Timbers220011977
Hughesville220081996
Easton219821982
Newark220251975
St. George'S Island220162016
Ijamsville220251986
Floyd120252007
Oldtown120151987
Smithsburg120141972
Wolfsville120241998
Bachman Mill120251966
Fowblesburg120051972
Randallstown120081983

Red-headed Woodpecker Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamichiganminnesotamississippimissourimontananebraskanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniasouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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