BirdAnalyst
Species · Montana · BBS 2025 Release · 1966–2024

Gray Partridge Population Trend in Montana

All statesGeneralists

Gray Partridge in Montana has risen sharply: up 70% on the route-weighted index since 1970.

+70%Since 1970
55Routes In State
56Years

Notable Gray Partridge Trends in Montana

long arc increasecomputed index

Gray Partridge has risen sharply in Montana: up 70% on the route-weighted index since 1970.

Gray Partridge Population Forecast in Montana

If the recent trend holds, Gray Partridge in Montana is projected to fall about 61% by 2029 — from 0.83 in 2024 to a central estimate of 0.32 (95% range 0.00–0.84). A 5-year backtest shows a typical error of ±82.4%, with 80% of held-out values landing inside the 95% band.

-61%Change by 2029
0.32Projected 2029 index
0.00–0.8495% range
±82.4%Backtest error
19682029
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
20250.330.000.84
20260.330.000.84
20270.330.000.84
20280.330.000.84
20290.320.000.84

Gray Partridge Survey Routes in Montana

Routes recording Gray Partridge in Montana.
Clyde Park1220242021
Circle820131973
Glentana720242015
Redstone620241970
Polson620241977
Glasgow520241968
Wolf Point520242015
Pablo Res.520051997
Virgelle420241979
Lambert420242021
Whitlash420222009
Oswego320231978
Highwood320231970
Flatwillow320071978
Reed Point320122008
Laurel320191973
Lindsay320242016
Hay Lake220221989
Harlem220171988
Glen220211979
Willow Creek 2220241984
Augusta219891984
Roy220241988
Brusett219941983
Savage219931979

Gray Partridge Population Trend in Other States

idahoillinoisindianaiowaminnesotanebraskanevadanew-yorknorth-dakotaoregonsouth-dakotautahwashingtonwisconsinwyoming

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