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

Pied-billed Grebe In Prairie Potholes

All regionsPrairie PotholesWetland birds

Pied-billed Grebe in Prairie Potholes has surged: up 141% on the route-weighted index since 1969.

+141%Since 1969
97Routes In Region
57Years

Notable Signals

long arc increasecomputed index

Pied-billed Grebe has surged in Prairie Potholes: up 141% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Pied-billed Grebe in Prairie Potholes is projected to rise about 32% by 2029 — from 1.6 in 2024 to a central estimate of 2.1 (95% range 0.35–3.8). A 5-year backtest shows a typical error of ±31.9%, with 100% of held-out values landing inside the 95% band.

+32%Change by 2029
2.1Projected 2029 index
0.35–3.895% range
±31.9%Backtest error
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 index95% low95% high
20252.00.283.7
20262.00.303.8
20272.00.323.8
20282.10.333.8
20292.10.353.8

Routes In Prairie Potholes

Routes recording Pied-billed Grebe in Prairie Potholes.
GeddesSOUTH-DAKOTA431999
BuchananNORTH-DAKOTA262024
White LakeSOUTH-DAKOTA152011
RoswellSOUTH-DAKOTA152012
Horsehead LkNORTH-DAKOTA132024
GettysburgSOUTH-DAKOTA132023
Danzig 2NORTH-DAKOTA102024
LakotaNORTH-DAKOTA92009
FormanNORTH-DAKOTA82024
WimbledonNORTH-DAKOTA82024
Big StoneMINNESOTA62012
Wild RoseNORTH-DAKOTA62024
CourtlandMINNESOTA52024
BroadlandSOUTH-DAKOTA52012
BrittonSOUTH-DAKOTA52022
ChokioMINNESOTA42024
WilmotSOUTH-DAKOTA42024
MaynardMINNESOTA32006
TracyMINNESOTA32018
Lake GeorgeNORTH-DAKOTA32019
DanzigNORTH-DAKOTA32013
WebsterNORTH-DAKOTA32023
NilesNORTH-DAKOTA32024
CarpioNORTH-DAKOTA32014
DenbighNORTH-DAKOTA32024

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