BirdAnalyst
Species · Louisiana · BBS 2025 Release · 1966–2024

Broad-winged Hawk Population Trend in Louisiana

All statesGeneralists

Broad-winged Hawk in Louisiana has surged: up 374% on the route-weighted index since 1970.

+374%Since 1970TrendPercent 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 →
60Routes 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 →
54YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Broad-winged Hawk 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 →

Broad-winged Hawk has surged in Louisiana: up 374% on the route-weighted index since 1970.

Broad-winged Hawk Population Forecast in Louisiana

If the recent trend holds, Broad-winged Hawk in Louisiana is projected to rise about 36% by 2029 — from 0.24 in 2024 to a central estimate of 0.33 (95% range 0.01–0.65). A 5-year backtest shows a typical error of ±63.6%, with 100% of held-out values landing inside the 95% band.

+36%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 →
0.33Projected 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 →
0.01–0.6595% 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 →
±63.6%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, Broad-winged Hawk in Louisiana is projected to rise about 36% by 2029 — from 0.24 in 2024 to a central estimate of 0.33 (95% range 0.01–0.65). A 5-year backtest shows a typical error of ±63.6%, 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 →
20250.330.000.65
20260.330.010.65
20270.330.010.65
20280.330.010.65
20290.330.010.65

Broad-winged Hawk Survey Routes in Louisiana

Routes recording Broad-winged Hawk 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 →
Natchez620181992
Tensas Nwr320071992
Fort Jessup320231998
Burr Ferry320241994
River Road219981989
Roseland220141973
Keystone220111982
Ivan220132006
Derry219891967
Fishville220121972
Cypress219811977
Clay220241985
Evelyn220232009
Flat Creek220152002
Pearl River220241989
Slidell219861986
Ivan 2220152015
Oakdale219941994
Haughton120182002
Bickham120171984
Plettenberg120211977
Easton119901968
Hackberry120161998
De Ridder120132007
Linville120132013

Broad-winged Hawk Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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