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Species · Louisiana · BBS 2025 Release · 1966–2024

Hairy Woodpecker Population Trend in Louisiana

All statesForest birds

Hairy Woodpecker in Louisiana has risen sharply: up 62% on the route-weighted index since 1969.

+62%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 →
83Routes 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 →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Hairy Woodpecker Trends in LouisianaNotable 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 risen sharply in Louisiana: up 62% on the route-weighted index since 1969.

Hairy Woodpecker Population Forecast in Louisiana

If the recent trend holds, Hairy Woodpecker in Louisiana is projected to stay roughly flat through 2029, near 0.29 (95% range 0.01–0.57). A 5-year backtest shows a typical error of ±17%, with 100% of held-out values landing inside the 95% band.

-0%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 →
0.29Projected 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 →
0.01–0.5795% 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 →
±17%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 Louisiana is projected to stay roughly flat through 2029, near 0.29 (95% range 0.01–0.57). A 5-year backtest shows a typical error of ±17%, with 100% of held-out values landing inside the 95% band.19672029
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 →
20250.300.020.58
20260.300.020.58
20270.300.020.58
20280.290.020.57
20290.290.010.57

Hairy Woodpecker Survey Routes in Louisiana

Routes recording Hairy Woodpecker in Louisiana.
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 →
Burr Ferry520101988
Grayson520192011
Junior419911988
Lafitte419911967
De Quincy320111998
Ivan320131999
Ivan 2320162014
Morgan City320132013
Atchafalaya320221997
Franklinton320092009
Freetown219951978
Bickham219991987
De Ridder219901979
Longstreet220241968
Gibson220192019
Kraemer220242011
Slidell219871985
Pearl River219961994
Forked Island 2220112010
Morgan City119861970
Lacombe119831972
Roseland120001971
Keystone119971968
Plettenberg120221981
Mamou119771977

Hairy Woodpecker Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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