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

Trumpeter Swan In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionWaterfowl

Trumpeter Swan in Boreal Hardwood Transition has surged: up 12× on the route-weighted index since 1996.

12×Since 1996
52Routes In Region
30Years

Notable Signals

long arc increasecomputed index

Trumpeter Swan has surged in Boreal Hardwood Transition: up 12× on the route-weighted index since 1996.

Forecast

If the recent trend holds, Trumpeter Swan in Boreal Hardwood Transition is projected to stay roughly flat through 2029, near 0.86 (95% range 0.24–1.5). A 5-year backtest shows a typical error of ±32.9%, with 100% of held-out values landing inside the 95% band.

-3%Change by 2029
0.86Projected 2029 index
0.24–1.595% range
±32.9%Backtest error
19942029
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
20250.780.161.4
20260.800.181.4
20270.820.201.4
20280.840.221.5
20290.860.241.5

Routes In Boreal Hardwood Transition

Routes recording Trumpeter Swan in Boreal Hardwood Transition.
BashawWISCONSIN152024
Tamarac NwrMINNESOTA102024
GlendaleMINNESOTA52024
NebishMINNESOTA52023
CavourWISCONSIN52022
OntonagonMICHIGAN42019
TahquamenonMICHIGAN42024
Pine RiverMINNESOTA42024
BagleyMINNESOTA42005
BerglandMICHIGAN32014
MareniscoMICHIGAN32019
DebsMINNESOTA32024
Sawbill CampMINNESOTA32024
Cass LakeMINNESOTA32012
MinongWISCONSIN32003
GilmanWISCONSIN32024
FlambeauWISCONSIN32017
Maple GroveMICHIGAN22023
CreightonMICHIGAN22004
Beaver LakeMICHIGAN22011
Betchler LksMICHIGAN22023
CromwellMINNESOTA22024
Wigwam BayMINNESOTA22021
BackusMINNESOTA22024
HovlandMINNESOTA22022

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