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

Black-billed Magpie In Prairie Potholes

All regionsPrairie PotholesGeneralists

Black-billed Magpie in Prairie Potholes has edged up: up 20% on the route-weighted index since 1969.

+20%Since 1969
50Routes In Region
57Years

Notable Signals

No notable trend signals for Black-billed Magpie in Prairie Potholes. See the full index history below.

Forecast

If the recent trend holds, Black-billed Magpie in Prairie Potholes is projected to fall about 27% by 2029 — from 1.4 in 2024 to a central estimate of 1.00 (95% range 0.41–1.6). A 5-year backtest shows a typical error of ±21.1%, with 100% of held-out values landing inside the 95% band.

-27%Change by 2029
1.00Projected 2029 index
0.41–1.695% range
±21.1%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
20250.980.391.6
20260.980.391.6
20270.990.401.6
20280.990.401.6
20291.000.411.6

Routes In Prairie Potholes

Routes recording Black-billed Magpie in Prairie Potholes.
RedstoneMONTANA352024
ErieMINNESOTA252017
ClevelandMONTANA222024
Hay LakeMONTANA142022
WylieMINNESOTA102024
Lake BronsonMINNESOTA102011
WhitlashMONTANA92024
Turtle MtnsNORTH-DAKOTA72024
HarlemMONTANA62021
StanleyNORTH-DAKOTA62021
OkleeMINNESOTA52021
GryglaMINNESOTA52017
BadgerMINNESOTA52018
ChinookMONTANA32024
CarpioNORTH-DAKOTA32023
DenbighNORTH-DAKOTA32023
Wild RoseNORTH-DAKOTA32008
VeblenSOUTH-DAKOTA31970
GlasgowMONTANA22023
Great FallsMONTANA22024
Wolf PointMONTANA22024
Sun RiverMONTANA22024
MidwayNEBRASKA21995
EmeradoNORTH-DAKOTA22018
RollaNORTH-DAKOTA22022

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