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

Tricolored Blackbird In Great Basin

All regionsGreat BasinGeneralists

Tricolored Blackbird in Great Basin has collapsed: down 86% on the route-weighted index since 1972.

-86%Since 1972
14Routes In Region
40Years

Notable Signals

long arc declinecomputed index

Tricolored Blackbird has collapsed in Great Basin: down 86% on the route-weighted index since 1972.

Forecast

If the recent trend holds, Tricolored Blackbird in Great Basin is projected to stay roughly flat through 2029, near 0.53 (95% range 0.00–2.7). A 5-year backtest shows a typical error of ±4987.9%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.53Projected 2029 index
0.00–2.795% range
±4987.9%Backtest error
19702029
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
20250.550.002.8
20260.540.002.8
20270.540.002.8
20280.530.002.7
20290.530.002.7

Routes In Great Basin

Routes recording Tricolored Blackbird in Great Basin.
DorrisCALIFORNIA2152007
Iron GateCALIFORNIA452011
MacdoelCALIFORNIA321987
IngallsCALIFORNIA211998
MerrillOREGON202012
Modoc PointOREGON101992
Honey LakeCALIFORNIA62017
NubieberCALIFORNIA42006
ChinchaloOREGON22013
LikelyCALIFORNIA12024
Crowder FlatCALIFORNIA12007
Lone RockOREGON11999
Bly 2OREGON12014
Scootney ReservoirWASHINGTON12024

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