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Species · Louisiana · BBS 2025 Release · 1966–2024

American Crow Population Trend in Louisiana

All statesGeneralists

American Crow in Louisiana has surged: up 86% on the route-weighted index since 1969.

+86%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 →
97Routes 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 American Crow 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 →

American Crow has surged in Louisiana: up 86% on the route-weighted index since 1969.

American Crow Population Forecast in Louisiana

If the recent trend holds, American Crow in Louisiana is projected to rise about 20% by 2029 — from 34 in 2024 to a central estimate of 41 (95% range 27–55). A 5-year backtest shows a typical error of ±29.9%, with 80% of held-out values landing inside the 95% band.

+20%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 →
41Projected 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 →
27–5595% 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 →
±29.9%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, American Crow in Louisiana is projected to rise about 20% by 2029 — from 34 in 2024 to a central estimate of 41 (95% range 27–55). A 5-year backtest shows a typical error of ±29.9%, with 80% 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 →
2025402654
2026402655
2027412655
2028412755
2029412755

American Crow Survey Routes in Louisiana

Routes recording American Crow 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 →
Derry11019891967
Ivan9720131998
Mount Union9220241998
Kraemer8720241997
Burr Ferry8220241987
Carlisle7919881968
Lafitte7619911967
Ivan 27620162014
Goodwill7020242004
Bickham6620241972
Vinton 26520242011
Pearl River6420241989
Fillmore6219891968
Carterville6019921992
Longstreet5820241967
Greensburg5720221988
Ramah5720241988
Fort Jessup5420231998
Pine Prairie5419971995
Mer Rouge5320081967
Oakdale5319941991
Easton5219901967
Hargis5220112005
Plettenberg5120221968
Franklinton5120242008

American Crow 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.