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

Greater Prairie-Chicken In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieGrassland birds

Greater Prairie-Chicken in Eastern Tallgrass Prairie has collapsed: down 89% on the route-weighted index since 1969.

-89%Since 1969
22Routes In Region
50Years

Notable Signals

long arc declinecomputed index

Greater Prairie-Chicken has collapsed in Eastern Tallgrass Prairie: down 88% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Greater Prairie-Chicken in Eastern Tallgrass Prairie is projected to stay roughly flat through 2027, near 0.00 (95% range 0.00–0.36). A 5-year backtest shows a typical error of ±686%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2027
0.00Projected 2027 index
0.00–0.3695% range
±686%Backtest error
19672027
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
20230.000.000.36
20240.000.000.36
20250.000.000.36
20260.000.000.36
20270.000.000.36

Routes In Eastern Tallgrass Prairie

Routes recording Greater Prairie-Chicken in Eastern Tallgrass Prairie.
WrefordKANSAS112014
LincolnvilleKANSAS102019
OlsburgKANSAS92008
LongtonKANSAS82000
ReeceKANSAS52015
GalesburgKANSAS41978
SenecaKANSAS41972
LaplandKANSAS32010
MelroseKANSAS21977
OhioMISSOURI21994
RockinghamMISSOURI21996
WelchOKLAHOMA21975
OlneyILLINOIS11967
ThrallKANSAS11968
DoverKANSAS11984
BarclayKANSAS12022
GrantvilleKANSAS11995
Trading PostKANSAS12011
JohnsonNEBRASKA12016
PeoriaOKLAHOMA11969
CollinsvilleOKLAHOMA11992
ForakerOKLAHOMA12006

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