BirdAnalyst
Species · BCR 11 · BBS 2025 Release · 1966–2024

Chimney Swift In Prairie Potholes

All regionsPrairie PotholesAerial insectivores

Chimney Swift in Prairie Potholes has fallen sharply: down 71% on the route-weighted index since 1969.

-71%Since 1969
70Routes In Region
57Years

Notable Signals

long arc declinecomputed index

Chimney Swift has fallen sharply in Prairie Potholes: down 71% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Chimney Swift in Prairie Potholes is projected to stay roughly flat through 2029, near 0.35 (95% range 0.00–0.97). A 5-year backtest shows a typical error of ±23.1%, with 100% of held-out values landing inside the 95% band.

-4%Change by 2029
0.35Projected 2029 index
0.00–0.9795% range
±23.1%Backtest error
19672029
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
20250.420.001.0
20260.400.001.0
20270.380.001.0
20280.370.000.99
20290.350.000.97

Routes In Prairie Potholes

Routes recording Chimney Swift in Prairie Potholes.
CourtlandMINNESOTA122024
TildenNEBRASKA82023
AbercrombieNORTH-DAKOTA82012
Abercrombie 2NORTH-DAKOTA72017
MidwayNEBRASKA62023
ArlingtonMINNESOTA52022
MadisonNEBRASKA52018
ScrantonIOWA42010
ClareIOWA42019
BadgerMINNESOTA42015
HarlemMONTANA42021
White LakeSOUTH-DAKOTA42000
PantherIOWA32023
ChandlerMINNESOTA32023
BeltramiMINNESOTA32007
Chokio NorthMINNESOTA32013
GlasgowMONTANA31982
Eagle CreekNEBRASKA32024
BroadlandSOUTH-DAKOTA32001
ForbesSOUTH-DAKOTA32024
MccallsburgIOWA22024
BurchinalIOWA22015
HartlandMINNESOTA22016
Redwood FallMINNESOTA22014
MaynardMINNESOTA22015

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