BirdAnalyst
Species · BCR 36 · BBS 2025 Release · 1966–2024

Loggerhead Shrike In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsGeneralists

Loggerhead Shrike in Tamaulipan Brushlands has surged: up 277% on the route-weighted index since 1976.

+277%Since 1976
16Routes In Region
47Years

Notable Signals

long arc increasecomputed index

Loggerhead Shrike has surged in Tamaulipan Brushlands: up 277% on the route-weighted index since 1976.

Forecast

If the recent trend holds, Loggerhead Shrike in Tamaulipan Brushlands is projected to fall about 32% by 2029 — from 1.2 in 2024 to a central estimate of 0.79 (95% range 0.16–1.4). A 5-year backtest shows a typical error of ±166.8%, with 60% of held-out values landing inside the 95% band.

-32%Change by 2029
0.79Projected 2029 index
0.16–1.495% range
±166.8%Backtest error
19692029
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
20250.750.121.4
20260.760.131.4
20270.770.141.4
20280.780.151.4
20290.790.161.4

Routes In Tamaulipan Brushlands

Routes recording Loggerhead Shrike in Tamaulipan Brushlands.
KingsvilleTEXAS62024
HeidelbergTEXAS42024
Mirando CityTEXAS22009
La PryorTEXAS22010
RaymondvilleTEXAS22024
El SauzTEXAS22015
ProgresoTEXAS22011
RachalTEXAS12023
RandadoTEXAS12022
EncinalTEXAS11977
George WestTEXAS12024
CatarinaTEXAS12006
HondoTEXAS12019
Catarina 3TEXAS12018
SejitaTEXAS12024
MillettTEXAS11995

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