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

Fish Crow Population Trend in Louisiana

All statesGeneralists

Fish Crow in Louisiana has surged: up 114% on the route-weighted index since 1969.

+114%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 Fish 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 →

Fish Crow has surged in Louisiana: up 114% on the route-weighted index since 1969.

Fish Crow Population Forecast in Louisiana

If the recent trend holds, Fish Crow in Louisiana is projected to rise about 45% by 2029 — from 2.9 in 2024 to a central estimate of 4.3 (95% range 0.58–7.9). A 5-year backtest shows a typical error of ±42.4%, with 100% of held-out values landing inside the 95% band.

+45%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 →
4.3Projected 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 →
0.58–7.995% 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 →
±42.4%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, Fish Crow in Louisiana is projected to rise about 45% by 2029 — from 2.9 in 2024 to a central estimate of 4.3 (95% range 0.58–7.9). A 5-year backtest shows a typical error of ±42.4%, 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 →
20254.30.648.0
20264.30.628.0
20274.30.618.0
20284.30.597.9
20294.30.587.9

Fish Crow Survey Routes in Louisiana

Routes recording Fish 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 →
Creole2119871967
Vinton 22120242011
Keystone2020131968
Ramah1920241988
Gibson1720191999
Gonzales1720191998
Morgan City1220222011
Bickham1120241972
Glencoe1120181988
Forked Island1120192008
Lake Cove1020182008
Easton919901968
Fort Jessup920231998
Oakdale819941991
Baton Rouge820241995
Freetown720191968
Zwolle720231999
Kraemer720242007
Ivan720132004
Evelyn720222004
Hackberry 2620242018
Derry 2620231990
Pine Prairie619971995
Ivan 2620162014
Plettenberg520221968

Fish Crow Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckymainemarylandmassachusettsmississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawest-virginia

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