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Species · Louisiana · BBS 2025 Release · 1966–2024

Loggerhead Shrike Population Trend in Louisiana

All statesGeneralists

Loggerhead Shrike in Louisiana has collapsed: down 82% on the route-weighted index since 1969.

-82%Since 1969
89Routes In State
57Years

Notable Loggerhead Shrike Trends in Louisiana

long arc declinecomputed index

Loggerhead Shrike has collapsed in Louisiana: down 82% on the route-weighted index since 1969.

Loggerhead Shrike Population Forecast in Louisiana

If the recent trend holds, Loggerhead Shrike in Louisiana is projected to rise about 33% by 2029 — from 1.0 in 2024 to a central estimate of 1.3 (95% range 0.00–3.7). A 5-year backtest shows a typical error of ±145.8%, with 100% of held-out values landing inside the 95% band.

+33%Change by 2029
1.3Projected 2029 index
0.00–3.795% range
±145.8%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
20251.60.004.0
20261.60.003.9
20271.50.003.8
20281.40.003.8
20291.30.003.7

Loggerhead Shrike Survey Routes in Louisiana

Routes recording Loggerhead Shrike in Louisiana.
Creole2719871967
Carlisle2219881968
Mamou1919821967
Junior1119911987
Lafitte919911967
Brousville920241998
Ltl Chenier 2920112010
Larose819921988
Morgan City719861967
Frogmore620241998
Grand Isle620192010
Burr Ferry620041987
Delhi620212011
Gran Chenier519811967
Keystone520131967
Mer Rouge520081969
Fillmore519891968
Berwick520181987
Cypress419871967
Fort Polk419751967
Transylvania420221998
Concord420192006
Morgan City420222011
Hackberry320141967
De Ridder320191967

Loggerhead Shrike Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradofloridageorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmichiganminnesotamississippimissourimontananebraskanevadanew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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