BirdAnalyst
Species · BCR 12 · BBS 2025 Release · 1966–2024

Black-billed Magpie In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionGeneralists

Black-billed Magpie in Boreal Hardwood Transition has surged: up 914% on the route-weighted index since 1981.

+914%Since 1981
15Routes In Region
38Years

Notable Signals

long arc increasecomputed index

Black-billed Magpie has surged in Boreal Hardwood Transition: up 914% on the route-weighted index since 1981.

Forecast

If the recent trend holds, Black-billed Magpie in Boreal Hardwood Transition is projected to rise about 106% by 2029 — from 0.24 in 2024 to a central estimate of 0.49 (95% range 0.25–0.74). A 5-year backtest shows a typical error of ±57.2%, with 80% of held-out values landing inside the 95% band.

+106%Change by 2029
0.49Projected 2029 index
0.25–0.7495% range
±57.2%Backtest error
19782029
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
20250.460.210.70
20260.470.220.71
20270.470.230.72
20280.480.240.73
20290.490.250.74

Routes In Boreal Hardwood Transition

Routes recording Black-billed Magpie in Boreal Hardwood Transition.
BagleyMINNESOTA132006
DebsMINNESOTA62024
NebishMINNESOTA52023
LudeMINNESOTA42023
Nett LakeMINNESOTA42024
Little ForkMINNESOTA32024
Pine RiverMINNESOTA22024
WaskishMINNESOTA22021
BlackduckMINNESOTA22021
BackusMINNESOTA12024
FloodwoodMINNESOTA12023
CohassetMINNESOTA12022
McgregorMINNESOTA12023
WarroadMINNESOTA12024
GreenbushMINNESOTA12024

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