BirdAnalyst
Species · BCR 21 · BBS 2025 Release · 1966–2024

Curve-billed Thrasher In Oaks and Prairies

All regionsOaks and PrairiesArid-land birds

Curve-billed Thrasher in Oaks and Prairies has collapsed: down 78% on the route-weighted index since 1970.

-78%Since 1970
11Routes In Region
52Years

Notable Signals

long arc declinecomputed index

Curve-billed Thrasher has collapsed in Oaks and Prairies: down 78% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Curve-billed Thrasher in Oaks and Prairies is projected to stay roughly flat through 2028, near 0.15 (95% range 0.00–0.56). A 5-year backtest shows a typical error of ±198.1%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2028
0.15Projected 2028 index
0.00–0.5695% range
±198.1%Backtest error
19682028
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
20240.170.000.57
20250.160.000.57
20260.160.000.57
20270.160.000.57
20280.150.000.56

Routes In Oaks and Prairies

Routes recording Curve-billed Thrasher in Oaks and Prairies.
BriteTEXAS42021
MegargelTEXAS32022
HobsonTEXAS12019
CampbelltonTEXAS12023
LockhartTEXAS12011
Lone OakTEXAS12011
OsageTEXAS12006
AlbanyTEXAS12019
OlneyTEXAS12003
Three RiversTEXAS12023
Whit Mtn.TEXAS11995

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