BirdAnalyst
Species · BCR 11 · BBS 2025 Release · 1966–2024

Greater Prairie-Chicken In Prairie Potholes

All regionsPrairie PotholesGrassland birds

Greater Prairie-Chicken in Prairie Potholes has surged: up 430% on the route-weighted index since 1970.

+430%Since 1970TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
22Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
40YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Greater Prairie-Chicken has surged in Prairie Potholes: up 430% on the route-weighted index since 1970.

Greater Prairie-Chicken In Prairie Potholes Population Forecast

If the recent trend holds, Greater Prairie-Chicken in Prairie Potholes is projected to fall about 15% by 2029 — from 0.42 in 2024 to a central estimate of 0.36 (95% range 0.03–0.69). A 5-year backtest shows a typical error of ±65.7%, with 20% of held-out values landing inside the 95% band.

-15%Change by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.36Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.03–0.6995% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±65.7%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Greater Prairie-Chicken in Prairie Potholes is projected to fall about 15% by 2029 — from 0.42 in 2024 to a central estimate of 0.36 (95% range 0.03–0.69). A 5-year backtest shows a typical error of ±65.7%, with 20% of held-out values landing inside the 95% band.19672029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20250.330.000.66
20260.340.010.67
20270.340.010.68
20280.350.020.68
20290.360.030.69

Routes In Prairie Potholes

Routes recording Greater Prairie-Chicken in Prairie Potholes.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Eagle CreekNEBRASKA142024
TildenNEBRASKA92024
MidwayNEBRASKA82023
RaymondSOUTH-DAKOTA62008
GlyndonMINNESOTA42024
SpartaNEBRASKA42021
OkleeMINNESOTA32004
BeltramiMINNESOTA32024
WylieMINNESOTA32009
CooperstownNORTH-DAKOTA31970
GeddesSOUTH-DAKOTA22002
ForbesSOUTH-DAKOTA21981
Lane 2SOUTH-DAKOTA22008
ErieMINNESOTA12007
GryglaMINNESOTA11981
BadgerMINNESOTA12003
LockhartMINNESOTA12022
WalcottNORTH-DAKOTA11987
HowardSOUTH-DAKOTA11981
White LakeSOUTH-DAKOTA11975
VolgaSOUTH-DAKOTA11971
Crow CreekSOUTH-DAKOTA12019

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