BirdAnalyst
Species · BCR 22 · BBS 2025 Release · 1966–2024

Gray Partridge In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieGeneralists

Gray Partridge in Eastern Tallgrass Prairie has collapsed: down 92% on the route-weighted index since 1969.

-92%Since 1969
33Routes In Region
50Years

Notable Signals

long arc declinecomputed index

Gray Partridge has collapsed in Eastern Tallgrass Prairie: down 92% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Gray Partridge in Eastern Tallgrass Prairie is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±105.7%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.00Projected 2029 index
0.00–0.1795% range
±105.7%Backtest error
19662029
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
20250.000.000.17
20260.000.000.17
20270.000.000.17
20280.000.000.17
20290.000.000.17

Routes In Eastern Tallgrass Prairie

Routes recording Gray Partridge in Eastern Tallgrass Prairie.
BedfordIOWA91989
BryantIOWA61998
Mill CreekILLINOIS41988
Cedar ValleyIOWA41991
GazaIOWA32015
AustinMINNESOTA32021
HolcombILLINOIS21993
AtkinsonILLINOIS21987
GeneseoILLINOIS21990
Troy GroveILLINOIS21995
SenecaILLINOIS21999
HebronINDIANA21970
MiddletownINDIANA21972
MilroyINDIANA21970
AliceIOWA21997
PrairieburgIOWA21993
PiersonIOWA22018
Davis CornerIOWA22024
Rock ValleyIOWA22001
Ash CreekMINNESOTA22014
LakevilleMINNESOTA21994
Le RoyMINNESOTA22017
ThurstonNEBRASKA21991
RaymondWISCONSIN21969
SheffieldILLINOIS11991

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