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Species · Montana · BBS 2025 Release · 1966–2024

Red-necked Grebe Population Trend in Montana

All statesWetland birds

Red-necked Grebe in Montana has collapsed: down 80% on the route-weighted index since 1971.

-80%Since 1971
8Routes In State
51Years

Notable Red-necked Grebe Trends in Montana

long arc declinecomputed index

Red-necked Grebe has collapsed in Montana: down 80% on the route-weighted index since 1971.

Red-necked Grebe Population Forecast in Montana

If the recent trend holds, Red-necked Grebe in Montana is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.15). A 5-year backtest shows a typical error of ±26.1%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.02Projected 2029 index
0.00–0.1595% range
±26.1%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
20250.030.000.16
20260.020.000.15
20270.020.000.15
20280.020.000.15
20290.020.000.15

Red-necked Grebe Survey Routes in Montana

Routes recording Red-necked Grebe in Montana.
Inside Road220242023
Noxon220022002
Augusta219971992
Kalispell120241969
St Mary120051985
St. Mary 2120242024
Arlee120111977
Two Dot120192016

Red-necked Grebe Population Trend in Other States

alaskaidahominnesotanorth-dakotaoregonwashingtonwisconsinwyoming

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