BirdAnalyst
Species · BCR 16 · BBS 2025 Release · 1966–2024

Swainson's Thrush In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauForest birds

Swainson's Thrush in Southern Rockies / Colorado Plateau has surged: up 109% on the route-weighted index since 1972.

+109%Since 1972
79Routes In Region
54Years

Notable Signals

long arc increasecomputed index

Swainson's Thrush has surged in Southern Rockies / Colorado Plateau: up 109% on the route-weighted index since 1972.

Forecast

If the recent trend holds, Swainson's Thrush in Southern Rockies / Colorado Plateau is projected to rise about 26% by 2029 — from 0.40 in 2024 to a central estimate of 0.50 (95% range 0.13–0.86). A 5-year backtest shows a typical error of ±54.1%, with 100% of held-out values landing inside the 95% band.

+26%Change by 2029
0.50Projected 2029 index
0.13–0.8695% range
±54.1%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
20250.480.120.84
20260.480.120.85
20270.490.130.85
20280.490.130.86
20290.500.130.86

Routes In Southern Rockies / Colorado Plateau

Routes recording Swainson's Thrush in Southern Rockies / Colorado Plateau.
AspenCOLORADO92024
Main CanyonUTAH92003
Moon Lake 2UTAH92023
YampaCOLORADO62023
SoapstoneUTAH62024
Moon LakeUTAH62002
YampaiARIZONA51969
ParlinCOLORADO52022
Dunckley PasCOLORADO52024
Rifle FallsCOLORADO52021
Stillwater Pass 2COLORADO52024
HarmonyCOLORADO41975
WarbonnetWYOMING42024
Deadman Rd.COLORADO32024
Steamboat L.COLORADO32024
Comanche PkCOLORADO32024
ComoCOLORADO32021
BeckUTAH31970
BeaverUTAH31973
Uintah NfUTAH31994
Fish Lake NfUTAH31996
GooseberryUTAH32024
Ryan ParkWYOMING32023
Lost LakeCOLORADO22022
DoylevilleCOLORADO22021

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