BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

Black-billed Magpie In Badlands and Prairies

All regionsBadlands and PrairiesGeneralists

Black-billed Magpie in Badlands and Prairies has edged up: up 17% on the route-weighted index since 1969.

+17%Since 1969
106Routes In Region
57Years

Notable Signals

No notable trend signals for Black-billed Magpie in Badlands and Prairies. See the full index history below.

Forecast

If the recent trend holds, Black-billed Magpie in Badlands and Prairies is projected to fall about 53% by 2029 — from 3.8 in 2024 to a central estimate of 1.8 (95% range 0.00–3.8). A 5-year backtest shows a typical error of ±51.7%, with 40% of held-out values landing inside the 95% band.

-53%Change by 2029
1.8Projected 2029 index
0.00–3.895% range
±51.7%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
20251.80.003.8
20261.80.003.8
20271.80.003.8
20281.80.003.8
20291.80.003.8

Routes In Badlands and Prairies

Routes recording Black-billed Magpie in Badlands and Prairies.
Reed PointMONTANA382024
HighwoodMONTANA302024
Wind Cave NpSOUTH-DAKOTA242024
WyarnoWYOMING142024
ArvadaWYOMING132024
Flatwillow 2MONTANA122023
DaytonWYOMING122024
BucknumWYOMING112024
Two DotMONTANA102024
Winifred 2MONTANA92024
GlenrockWYOMING91977
Gvnt ValleyWYOMING82024
St Xavier 2MONTANA72023
DickinsonNORTH-DAKOTA72024
SolenNORTH-DAKOTA72024
Soda WellWYOMING72024
ShawmutMONTANA62024
Miles CityMONTANA62024
Chuffey SpringMONTANA62024
SchoonoverWYOMING62024
RecluseWYOMING62024
MayoworthWYOMING62024
Seely 2WYOMING62024
BrandenbergMONTANA52015
WinifredMONTANA52023

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