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

Sora In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionWetland birds

Sora in Boreal Hardwood Transition has fallen sharply: down 72% on the route-weighted index since 1968.

-72%Since 1968
59Routes In Region
56Years

Notable Signals

long arc declinecomputed index

Sora has fallen sharply in Boreal Hardwood Transition: down 72% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Sora in Boreal Hardwood Transition is projected to fall about 20% by 2029 — from 0.11 in 2024 to a central estimate of 0.09 (95% range 0.00–0.27). A 5-year backtest shows a typical error of ±70.9%, with 100% of held-out values landing inside the 95% band.

-20%Change by 2029
0.09Projected 2029 index
0.00–0.2795% range
±70.9%Backtest error
19662029
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
20250.090.000.27
20260.090.000.27
20270.090.000.27
20280.090.000.27
20290.090.000.27

Routes In Boreal Hardwood Transition

Routes recording Sora in Boreal Hardwood Transition.
BackusMINNESOTA52019
BrainerdMINNESOTA52024
CreightonMICHIGAN21993
CathroMICHIGAN22013
WaskishMINNESOTA22017
GreenbushMINNESOTA22024
Cass LakeMINNESOTA22012
ExelandWISCONSIN22017
BerglandMICHIGAN11982
MareniscoMICHIGAN12016
BootjackMICHIGAN12007
Maple GroveMICHIGAN12017
Brocky LakeMICHIGAN12017
WilsonMICHIGAN11987
CunardMICHIGAN12018
ShingletonMICHIGAN12022
Bear LakeMICHIGAN12011
TahquamenonMICHIGAN12013
Skegemog PtMICHIGAN11986
PickfordMICHIGAN12014
RiggsvilleMICHIGAN12018
OberlinMICHIGAN11974
HerronMICHIGAN12016
Seney NwrMICHIGAN12019
Scott'S MarshMICHIGAN12008

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