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

Bachman's Sparrow Population Trend in Louisiana

All statesGeneralists

Bachman's Sparrow in Louisiana has collapsed: down 95% on the route-weighted index since 1969.

-95%Since 1969
30Routes In State
50Years

Notable Bachman's Sparrow Trends in Louisiana

long arc declinecomputed index

Bachman's Sparrow has collapsed in Louisiana: down 95% on the route-weighted index since 1969.

Bachman's Sparrow Population Forecast in Louisiana

If the recent trend holds, Bachman's Sparrow in Louisiana is projected to fall about 100% by 2029 — from 0.10 in 2024 to a central estimate of 0.00 (95% range 0.00–0.68). A 5-year backtest shows a typical error of ±1089.4%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–0.6895% range
±1089.4%Backtest error
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 index95% low95% high
20250.000.000.68
20260.000.000.68
20270.000.000.68
20280.000.000.68
20290.000.000.68

Bachman's Sparrow Survey Routes in Louisiana

Routes recording Bachman's Sparrow in Louisiana.
Mer Rouge1120061969
Pearl River720081989
Lacombe619831967
De Quincy419981998
Natchez420241992
Derry319891970
Fort Polk319751967
Slidell319881984
Derry 2319971990
Fishville220081967
Hargis 2220132013
Clay219721968
Greensburg219921988
Roseland119901967
Bickham119861986
Fort Jessup120182018
Ivan119981998
Easton119811975
De Ridder120141968
Cypress119731971
Chatham119731968
Longstreet119841968
Fillmore119691969
Trout119971997
Marion119951995

Bachman's Sparrow Population Trend in Other States

alabamaarkansasfloridageorgiakentuckymississippimissourinorth-carolinaohiooklahomasouth-carolinatennesseetexasvirginia

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