BirdAnalyst
Species · BCR 10 · BBS 2025 Release · 1966–2024

Western Grebe In Northern Rockies

All regionsNorthern RockiesWetland birds

Western Grebe in Northern Rockies has collapsed: down 82% on the route-weighted index since 1988.

-82%Since 1988
39Routes In Region
38Years

Notable Signals

long arc declinecomputed index

Western Grebe has collapsed in Northern Rockies: down 82% on the route-weighted index since 1988.

Forecast

If the recent trend holds, Western Grebe in Northern Rockies is projected to fall about 100% by 2029 — from 0.16 in 2024 to a central estimate of 0.00 (95% range 0.00–1.5). A 5-year backtest shows a typical error of ±166.3%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–1.595% range
±166.3%Backtest error
19862029
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
20250.000.001.5
20260.000.001.5
20270.000.001.5
20280.000.001.5
20290.000.001.5

Routes In Northern Rockies

Routes recording Western Grebe in Northern Rockies.
Carter 2WYOMING192024
SpartaOREGON122000
MidvaleWYOMING81996
TensleepWYOMING61997
Crane CreekIDAHO42009
Hebgen LakeMONTANA42023
EtheteWYOMING42023
CabartonIDAHO32023
Neponset ResUTAH32018
Rock RiverWYOMING32022
Rawlins 2WYOMING32022
MivodenIDAHO22022
BeaverheadMONTANA22018
Red RockMONTANA21994
RandolphUTAH22005
E. Bear LakeUTAH22006
ClarkWYOMING22001
AlpineWYOMING22022
Mtn ViewWYOMING22024
Flamin GorgeWYOMING22010
NaplesIDAHO11993
Sawtooth CtyIDAHO12014
FeathervilleIDAHO12022
Libby DamMONTANA11986
KalispellMONTANA12003

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