BirdAnalyst
Species · Wisconsin · BBS 2025 Release · 1966–2024

Northern Rough-winged Swallow Population Trend in Wisconsin

All statesAerial insectivores

Northern Rough-winged Swallow in Wisconsin has edged down: down 17% on the route-weighted index since 1968.

-17%Since 1968
91Routes In State
58Years

Notable Northern Rough-winged Swallow Trends in Wisconsin

No notable trend signals for Northern Rough-winged Swallow in Wisconsin. See the full index history below.

Northern Rough-winged Swallow Population Forecast in Wisconsin

If the recent trend holds, Northern Rough-winged Swallow in Wisconsin is projected to rise about 144% by 2029 — from 0.57 in 2024 to a central estimate of 1.4 (95% range 0.31–2.5). A 5-year backtest shows a typical error of ±122%, with 40% of held-out values landing inside the 95% band.

+144%Change by 2029
1.4Projected 2029 index
0.31–2.595% range
±122%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
20251.40.342.5
20261.40.342.5
20271.40.332.5
20281.40.322.5
20291.40.312.5

Northern Rough-winged Swallow Survey Routes in Wisconsin

Routes recording Northern Rough-winged Swallow in Wisconsin.
Esdaile2220231966
Eagle River1820111971
Cochrane1420221966
Gilmanton1320221970
River Falls1220221998
Gilman920221969
Clintonville920181972
Annaton820241998
Hazel Green720181967
Verona620231991
Prairie Du Chien620241999
Kendall520221967
Pardeeville520211980
Fall River520241966
Highland520211999
Beloit520241998
Popple River420221969
Elderon419981967
New Lisbon420171967
Paris420241966
Omro 2420242002
Cavour420212000
Kiel420221998
Mukwonago420032000
Chaffey320151972

Northern Rough-winged Swallow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawyoming

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