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Species · Louisiana · BBS 2026 Release · 1966–2025

Hooded Warbler Population Trend in Louisiana

All statesForest birds

Hooded Warbler in Louisiana has surged: up 646% on the route-weighted index since 1969.

+646%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 →
72Routes 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 →
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 Hooded Warbler 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 →

Hooded Warbler has surged in Louisiana: up 646% on the route-weighted index since 1969.

Hooded Warbler Population Forecast in Louisiana

If the recent trend holds, Hooded Warbler in Louisiana is projected to fall about 12% by 2030 — from 9.9 in 2025 to a central estimate of 8.7 (95% range 5.9–11). A 5-year backtest shows a typical error of ±41.8%, with 0% of held-out values landing inside the 95% band.

-12%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 →
8.7Projected 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 →
5.9–1195% 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 →
±41.8%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, Hooded Warbler in Louisiana is projected to fall about 12% by 2030 — from 9.9 in 2025 to a central estimate of 8.7 (95% range 5.9–11). A 5-year backtest shows a typical error of ±41.8%, with 0% of held-out values landing inside the 95% band.19672030
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 →
20268.25.411
20278.35.511
20288.45.611
20298.55.811
20308.75.911

Hooded Warbler Survey Routes in Louisiana

Routes recording Hooded Warbler 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 →
Mount Union3920251998
Grayson3720212005
Flat Creek3620251998
Evelyn3420242004
Womack3320251999
Norwood2920252004
Enterprise2320252006
Burr Ferry2220251987
Fort Jessup2120231998
Linville2120251998
Natchez2120251992
Plettenberg2020221973
Pearl River2020251989
Derry 21820251990
Greensburg1720221988
Ivan 21720252014
Marion1619961988
Hargis1520112005
Zwolle1520231998
Fishville 21520252018
Cheniere1520251984
Trout1420251988
Fishville1320171970
De Quincy1320211998
Ivan1320131998

Hooded Warbler Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianakentuckymarylandmassachusettsmichiganmississippimissourinew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvirginiawest-virginiawisconsin

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