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

Bank Swallow In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionAerial insectivores

Bank Swallow in Boreal Hardwood Transition has collapsed: down 92% on the route-weighted index since 1968.

-92%Since 1968
93Routes In Region
58Years

Notable Signals

long arc declinecomputed index

Bank Swallow has collapsed in Boreal Hardwood Transition: down 92% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Bank Swallow in Boreal Hardwood Transition is projected to fall about 51% by 2029 — from 0.19 in 2024 to a central estimate of 0.09 (95% range 0.00–1.8). A 5-year backtest shows a typical error of ±161.6%, with 100% of held-out values landing inside the 95% band.

-51%Change by 2029
0.09Projected 2029 index
0.00–1.895% range
±161.6%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
20250.260.001.9
20260.210.001.9
20270.170.001.8
20280.130.001.8
20290.090.001.8

Routes In Boreal Hardwood Transition

Routes recording Bank Swallow in Boreal Hardwood Transition.
BerglandMICHIGAN411993
WilsonMICHIGAN402007
BenaMINNESOTA201967
IrmaWISCONSIN122000
HollisterWISCONSIN122012
CathroMICHIGAN102007
LudeMINNESOTA102016
BagleyMINNESOTA101995
BootjackMICHIGAN82009
CromwellMINNESOTA82022
NebishMINNESOTA81993
CavourWISCONSIN82009
BemidjiMINNESOTA71980
MahtowaMINNESOTA71993
OntonagonMICHIGAN61971
MareniscoMICHIGAN62003
Walloon Lake 2MICHIGAN62024
CouderayWISCONSIN62017
ExelandWISCONSIN62010
IshpemingMICHIGAN51991
CreightonMICHIGAN52019
SkeelsMICHIGAN52008
Red OakMICHIGAN51990
WaskishMINNESOTA51988
PickfordMICHIGAN42014

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