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

Loggerhead Shrike Population Trend in Arizona

All statesGeneralists

Loggerhead Shrike in Arizona has fallen sharply: down 67% on the route-weighted index since 1970.

-67%Since 1970
76Routes In State
56Years

Notable Loggerhead Shrike Trends in Arizona

long arc declinecomputed index

Loggerhead Shrike has fallen sharply in Arizona: down 67% on the route-weighted index since 1970.

Loggerhead Shrike Population Forecast in Arizona

If the recent trend holds, Loggerhead Shrike in Arizona is projected to fall about 31% by 2029 — from 1.8 in 2024 to a central estimate of 1.3 (95% range 0.00–3.4). A 5-year backtest shows a typical error of ±25.6%, with 100% of held-out values landing inside the 95% band.

-31%Change by 2029
1.3Projected 2029 index
0.00–3.495% range
±25.6%Backtest error
19682029
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
20251.40.003.5
20261.40.003.5
20271.30.003.4
20281.30.003.4
20291.30.003.4

Loggerhead Shrike Survey Routes in Arizona

Routes recording Loggerhead Shrike in Arizona.
Squaw Peak1519701968
Oatman1320191988
Mormon Lake919741968
Cabeza Priet920241994
San Simon720241969
Bates Well720231995
Cibola Lake720241993
Gila Bend720241995
Seligman720241994
Hunt620181968
Vicksburg619891968
Sunizona519971969
Riviera520241992
Wickenburg520232017
Kaibito420191996
Sunizona 2420242001
The Gap319761968
Rucker320091993
New River320161974
Dateland320211990
Lukeville319801975
Peña Blanca320241975
Cow Springs320171992
Bartlett Res320242000
Cutter320142014

Loggerhead Shrike Population Trend in Other States

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

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