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Species · BCR 14 · BBS 2025 Release · 1966–2024

Hairy Woodpecker In Atlantic Northern Forest

All regionsAtlantic Northern ForestForest birds

Hairy Woodpecker in Atlantic Northern Forest has surged: up 127% on the route-weighted index since 1968.

+127%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 →
155Routes In RegionSurvey 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 SignalsNotable 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 →

Hairy Woodpecker has surged in Atlantic Northern Forest: up 127% on the route-weighted index since 1968.

Hairy Woodpecker In Atlantic Northern Forest Population Forecast

If the recent trend holds, Hairy Woodpecker in Atlantic Northern Forest is projected to stay roughly flat through 2029, near 2.1 (95% range 1.5–2.6). A 5-year backtest shows a typical error of ±9.5%, with 100% of held-out values landing inside the 95% band.

-10%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 →
2.1Projected 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 →
1.5–2.695% 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 →
±9.5%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, Hairy Woodpecker in Atlantic Northern Forest is projected to stay roughly flat through 2029, near 2.1 (95% range 1.5–2.6). A 5-year backtest shows a typical error of ±9.5%, 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 →
20252.01.42.6
20262.01.42.6
20272.01.52.6
20282.01.52.6
20292.11.52.6

Routes In Atlantic Northern Forest

Routes recording Hairy Woodpecker in Atlantic Northern Forest.
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 →
WaiteMAINE121977
BrooksMAINE92019
NorthfieldMAINE91981
HancockMAINE82024
CharlestonMAINE72019
Pillsbury PdMAINE71968
East TroyMAINE62019
ConcordNEW-HAMPSHIRE62024
WalpoleNEW-HAMPSHIRE62024
EastbrookMAINE52024
CanterburyNEW-HAMPSHIRE52024
Dixvil NotchNEW-HAMPSHIRE52016
HardwickVERMONT52024
ReedsMAINE42024
Seboomook LkMAINE42014
Clayton LakeMAINE42001
Baker LakeMAINE42005
FitzwilliamNEW-HAMPSHIRE42024
MarlowNEW-HAMPSHIRE42024
FranconiaNEW-HAMPSHIRE42024
ClarksvilleNEW-HAMPSHIRE42024
Jeffers NtchNEW-HAMPSHIRE42019
PetersburgNEW-YORK42012
SpeculatorNEW-YORK42024
InletNEW-YORK42017

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