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Species · Louisiana · BBS 2025 Release · 1966–2024

Hooded Warbler Population Trend in Louisiana

All statesForest birds

Hooded Warbler in Louisiana has surged: up 680% on the route-weighted index since 1969.

+680%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 →
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 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 680% 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 18% by 2029 — from 10 in 2024 to a central estimate of 8.4 (95% range 5.6–11). A 5-year backtest shows a typical error of ±39.3%, with 20% of held-out values landing inside the 95% band.

-18%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 →
8.4Projected 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 →
5.6–1195% 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 →
±39.3%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 →
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 →
20257.95.111
20268.05.311
20278.25.411
20288.35.511
20298.45.611

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 →
Flat Creek4820241998
Grayson3720212005
Evelyn3420242004
Womack3320241999
Norwood3020242004
Derry 22920241990
Clay2620241968
Goodwill2320242004
Mount Union2220241998
Fort Jessup2120231998
Burr Ferry2120241987
Plettenberg2020221973
Trout1920241988
Enterprise1820242006
Natchez1820241992
Fishville 21820242018
Linville1720241998
Greensburg1720221988
Marion1619961988
Cheniere1620241984
Hargis1520112005
Zwolle1520231998
Ivan 21520162014
Fishville1320171970
Longstreet1320241968

Hooded Warbler Population Trend in Other States

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

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