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

Gray Partridge In Great Basin

All regionsGreat BasinGeneralists

Gray Partridge in Great Basin has fallen sharply: down 58% on the route-weighted index since 1970.

-58%Since 1970
66Routes In Region
55Years

Notable Signals

long arc declinecomputed index

Gray Partridge has fallen sharply in Great Basin: down 58% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Gray Partridge in Great Basin is projected to fall about 53% by 2029 — from 0.09 in 2024 to a central estimate of 0.04 (95% range 0.00–0.21). A 5-year backtest shows a typical error of ±16.8%, with 100% of held-out values landing inside the 95% band.

-53%Change by 2029
0.04Projected 2029 index
0.00–0.2195% range
±16.8%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
20250.050.000.22
20260.050.000.21
20270.050.000.21
20280.050.000.21
20290.040.000.21

Routes In Great Basin

Routes recording Gray Partridge in Great Basin.
HarringtonWASHINGTON102004
PicaboIDAHO82014
PromontoryUTAH61970
JosephOREGON42013
Moses LakeWASHINGTON42009
GiffordIDAHO32010
BakerIDAHO32019
Pasadena ValIDAHO32012
Mud LakeIDAHO32011
Lost RiverIDAHO32000
Humboldt Nf 2NEVADA32024
ConnellWASHINGTON31988
EwanWASHINGTON31995
KeystoneWASHINGTON32023
LeadoreIDAHO22018
DuboisIDAHO22010
Blacks CreekIDAHO21977
RirieIDAHO22011
PocatelloIDAHO22011
Blackft ResIDAHO22016
Iron SpringsIDAHO22024
Dougal ResIDAHO22019
Daniels ResIDAHO22007
PrestonIDAHO21988
JarbidgeNEVADA22012

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