BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

Loggerhead Shrike In Great Basin

All regionsGreat BasinGeneralists

Loggerhead Shrike in Great Basin has declined: down 35% on the route-weighted index since 1970.

-35%Since 1970
173Routes In Region
56Years

Notable Signals

No notable trend signals for Loggerhead Shrike in Great Basin. See the full index history below.

Forecast

If the recent trend holds, Loggerhead Shrike in Great Basin is projected to fall about 40% by 2029 — from 1.6 in 2024 to a central estimate of 0.96 (95% range 0.30–1.6). A 5-year backtest shows a typical error of ±20%, with 80% of held-out values landing inside the 95% band.

-40%Change by 2029
0.96Projected 2029 index
0.30–1.695% range
±20%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
20250.970.311.6
20260.960.311.6
20270.960.311.6
20280.960.301.6
20290.960.301.6

Routes In Great Basin

Routes recording Loggerhead Shrike in Great Basin.
Toiyabe NfNEVADA302024
GandyUTAH242015
SnowvilleUTAH182024
Harney LakeOREGON162024
RavendaleCALIFORNIA132024
Majors PlaceNEVADA132024
MikkaloOREGON112023
Malheur NwrOREGON92022
Johnson CanUTAH92022
CortezNEVADA82024
Bowden HillsOREGON82024
Arid Land ErWASHINGTON81996
Kyle CanyonIDAHO72024
MizpahNEVADA62024
MinervaNEVADA62024
Desert NwrNEVADA62024
Alvord LakeOREGON62024
Crooked Riv.OREGON62019
Trout CreekOREGON62021
PotholesWASHINGTON61997
Hot SpringIDAHO52014
Sand PassNEVADA52024
SutcliffeNEVADA51972
Ruby Valley 2NEVADA52024
Virgin CreekNEVADA52018

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