BirdAnalyst
Species · Louisiana · BBS 2026 Release · 1966–2025

Blue Jay Population Trend in Louisiana

All statesForest birds

Blue Jay in Louisiana has edged up: up 15% on the route-weighted index since 1969.

+15%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 →
99Routes 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 Blue Jay 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 Blue Jay in Louisiana. See the full index history below.

Blue Jay Population Forecast in Louisiana

If the recent trend holds, Blue Jay in Louisiana is projected to stay roughly flat through 2030, near 23 (95% range 18–28). A 5-year backtest shows a typical error of ±5.5%, with 100% of held-out values landing inside the 95% band.

+8%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 →
23Projected 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 →
18–2895% 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 →
±5.5%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, Blue Jay in Louisiana is projected to stay roughly flat through 2030, near 23 (95% range 18–28). A 5-year backtest shows a typical error of ±5.5%, 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 →
2026231828
2027231828
2028231828
2029231828
2030231828

Blue Jay Survey Routes in Louisiana

Routes recording Blue Jay 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 →
Junior7119911987
Roseland5020251967
Mamou4919821967
Hackberry 24820252018
Longstreet4520251967
Greensburg4420221988
Pearl River4420251989
Baton Rouge4420251995
Brousville4320251998
Bickham4020251972
Plettenberg3820221968
Carlisle3719881968
Fishville 23520252018
Fishville3420171967
Gonzales3220191998
Ville Platte3220191988
Vinton 23220252011
Easton2919901967
Mount Union2920251998
Fort Jessup2920231998
Pine Prairie2919971995
Keystone2820131967
Zwolle2820231998
Cypress2719871967
Trout2720251988

Blue Jay Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.