BirdAnalyst
Species · BCR 23 · BBS 2025 Release · 1966–2024

Trumpeter Swan In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionWaterfowl

Trumpeter Swan in Prairie Hardwood Transition has surged: up 42× on the route-weighted index since 1994.

42×Since 1994
35Routes In Region
29Years

Notable Signals

long arc increasecomputed index

Trumpeter Swan has surged in Prairie Hardwood Transition: up 42× on the route-weighted index since 1994.

Forecast

If the recent trend holds, Trumpeter Swan in Prairie Hardwood Transition is projected to fall about 23% by 2029 — from 0.65 in 2024 to a central estimate of 0.49 (95% range 0.32–0.68). A 5-year backtest shows a typical error of ±33.5%, with 40% of held-out values landing inside the 95% band.

-23%Change by 2029
0.49Projected 2029 index
0.32–0.6895% range
±33.5%Backtest error
19902029
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
20250.440.260.62
20260.450.270.63
20270.470.290.65
20280.480.300.66
20290.490.320.68

Routes In Prairie Hardwood Transition

Routes recording Trumpeter Swan in Prairie Hardwood Transition.
Sherburne NrMINNESOTA192024
LoraineWISCONSIN142021
HudsonWISCONSIN132024
BrownsvilleWISCONSIN82022
DresserWISCONSIN72024
KnappMINNESOTA42024
EdwardsMINNESOTA42024
MatherWISCONSIN42023
Buena VistaWISCONSIN42024
CohoctahMICHIGAN32024
LimestoneOHIO32019
Money CreekMINNESOTA22024
MinnetonkaMINNESOTA22024
PrincetonMINNESOTA22024
Le CenterMINNESOTA22015
Brook ParkMINNESOTA22018
AshbyMINNESOTA22021
CumberlandWISCONSIN22024
WeyerhauserWISCONSIN22023
PrincetonWISCONSIN22024
N AndoverWISCONSIN22022
LawrenceMICHIGAN12023
NashvilleMICHIGAN12006
GalesburgMICHIGAN12019
HowardsvilleMICHIGAN12015

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