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Species · Louisiana · BBS 2025 Release · 1966–2024

Ruby-throated Hummingbird Population Trend in Louisiana

All statesGeneralists

Ruby-throated Hummingbird in Louisiana has edged up: up 22% on the route-weighted index since 1969.

+22%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 →
87Routes 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 Ruby-throated Hummingbird 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 →

No notable trend signals for Ruby-throated Hummingbird in Louisiana. See the full index history below.

Ruby-throated Hummingbird Population Forecast in Louisiana

If the recent trend holds, Ruby-throated Hummingbird in Louisiana is projected to stay roughly flat through 2029, near 0.56 (95% range 0.08–1.0). A 5-year backtest shows a typical error of ±9.2%, with 100% of held-out values landing inside the 95% band.

-8%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 →
0.56Projected 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 →
0.08–1.095% 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 →
±9.2%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, Ruby-throated Hummingbird in Louisiana is projected to stay roughly flat through 2029, near 0.56 (95% range 0.08–1.0). A 5-year backtest shows a typical error of ±9.2%, 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 →
20250.570.091.1
20260.570.091.0
20270.570.081.0
20280.560.081.0
20290.560.081.0

Ruby-throated Hummingbird Survey Routes in Louisiana

Routes recording Ruby-throated Hummingbird 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 →
Kraemer620231997
Concord420192017
Port Allen420102001
Keystone320061970
Norwood320242006
Fort Jessup320221999
Goodwill320212013
Lafitte219911967
Cypress219871967
Mer Rouge220081969
Chatham219751967
Longstreet220241967
Floyd220192015
Zwolle220171999
Transylvania220222011
Womack220241999
Natchitoches219871987
Cheniere220241984
Pine Prairie219971997
Natchez220241992
Ivan 2220162014
River Road220241988
Baton Rouge220241997
Carlisle119871987
Junior119881988

Ruby-throated Hummingbird Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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