BirdAnalyst
Species · BCR 18 · BBS 2025 Release · 1966–2024

Curve-billed Thrasher In Shortgrass Prairie

All regionsShortgrass PrairieArid-land birds

Curve-billed Thrasher in Shortgrass Prairie has increased: up 30% on the route-weighted index since 1970.

+30%Since 1970
58Routes In Region
54Years

Notable Signals

No notable trend signals for Curve-billed Thrasher in Shortgrass Prairie. See the full index history below.

Forecast

If the recent trend holds, Curve-billed Thrasher in Shortgrass Prairie is projected to rise about 30% by 2029 — from 0.43 in 2024 to a central estimate of 0.56 (95% range 0.23–0.90). A 5-year backtest shows a typical error of ±71%, with 100% of held-out values landing inside the 95% band.

+30%Change by 2029
0.56Projected 2029 index
0.23–0.9095% range
±71%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
20250.540.210.87
20260.550.210.88
20270.550.220.88
20280.560.230.89
20290.560.230.90

Routes In Shortgrass Prairie

Routes recording Curve-billed Thrasher in Shortgrass Prairie.
SabinosoNEW-MEXICO62019
KermitTEXAS61994
MentoneTEXAS62015
PecosTEXAS62017
VariaderoNEW-MEXICO52022
GrenvilleNEW-MEXICO42021
ClovisNEW-MEXICO42024
RankinTEXAS42024
WinkTEXAS41986
VillegreenCOLORADO32024
FeltOKLAHOMA32024
CrowleyCOLORADO22024
UlyssesKANSAS22024
FarleyNEW-MEXICO22024
MaljamarNEW-MEXICO21975
PepNEW-MEXICO22015
LoganNEW-MEXICO22024
PlainsTEXAS22024
ChanningTEXAS22013
TexlineTEXAS22016
MidlandTEXAS22023
Mica ButteCOLORADO11981
GilpinCOLORADO12024
CampoCOLORADO12018
Cone MtnCOLORADO12024

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