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Species · Louisiana · BBS 2026 Release · 1966–2025

American Crow Population Trend in Louisiana

All statesGeneralists

American Crow in Louisiana has surged: up 77% on the route-weighted index since 1969.

+77%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 →
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 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 77% 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 23% by 2030 — from 33 in 2025 to a central estimate of 41 (95% range 27–55). A 5-year backtest shows a typical error of ±20%, with 100% of held-out values landing inside the 95% band.

+23%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 →
41Projected 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 →
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 →
±20%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 23% by 2030 — from 33 in 2025 to a central estimate of 41 (95% range 27–55). A 5-year backtest shows a typical error of ±20%, with 100% 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 →
2026402654
2027402654
2028402654
2029402655
2030412755

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
Kraemer8520251997
Carlisle7919881968
Lafitte7619911967
Bickham7520251972
Mount Union7120251998
Burr Ferry6720251987
Fillmore6219891968
Carterville6019921992
Goodwill5920252004
Greensburg5720221988
Womack5420251999
Fort Jessup5420231998
Pine Prairie5419971995
Mer Rouge5320081967
Ramah5320251988
Oakdale5319941991
Easton5219901967
Hargis5220112005
Plettenberg5120221968
Fishville 25120252018
Vinton 25020252011
Larose4919921988
Derry 24520251990

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 2026-08-14.