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

Bank Swallow In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionAerial insectivores

Bank Swallow in Prairie Hardwood Transition has collapsed: down 86% on the route-weighted index since 1968.

-86%Since 1968
147Routes In Region
58Years

Notable Signals

long arc declinecomputed index

Bank Swallow has collapsed in Prairie Hardwood Transition: down 86% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Bank Swallow in Prairie Hardwood Transition is projected to fall about 82% by 2029 — from 1.3 in 2024 to a central estimate of 0.24 (95% range 0.00–4.0). A 5-year backtest shows a typical error of ±22.6%, with 100% of held-out values landing inside the 95% band.

-82%Change by 2029
0.24Projected 2029 index
0.00–4.095% range
±22.6%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
20250.800.004.5
20260.660.004.4
20270.520.004.3
20280.380.004.1
20290.240.004.0

Routes In Prairie Hardwood Transition

Routes recording Bank Swallow in Prairie Hardwood Transition.
OmroWISCONSIN682001
Whitewater 2MINNESOTA492015
WhitewaterMINNESOTA402000
BismarkOHIO351995
Money CreekMINNESOTA322019
Rolling GrndWISCONSIN302023
Prairie Du ChienWISCONSIN302015
VickeryOHIO282024
Hamburg 2MICHIGAN272022
HamburgMICHIGAN202001
MillvilleMINNESOTA182019
Mount HorebWISCONSIN181990
JuniataMICHIGAN162024
TyreMICHIGAN151996
MontereyMICHIGAN122024
KingswayOHIO122003
KnoxINDIANA111985
AdairMICHIGAN101995
EdwardsMINNESOTA102024
ClintonvilleWISCONSIN102018
EdenWISCONSIN92024
BeloitWISCONSIN92024
South BendINDIANA81975
WeyerhauserWISCONSIN82023
CadottWISCONSIN82024

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