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

Chimney Swift Population Trend in Missouri

All statesAerial insectivores

Chimney Swift in Missouri has collapsed: down 88% on the route-weighted index since 1969.

-88%Since 1969
91Routes In State
57Years

Notable Chimney Swift Trends in Missouri

long arc declinecomputed index

Chimney Swift has collapsed in Missouri: down 88% on the route-weighted index since 1969.

Chimney Swift Population Forecast in Missouri

If the recent trend holds, Chimney Swift in Missouri is projected to fall about 100% by 2029 — from 0.69 in 2024 to a central estimate of 0.00 (95% range 0.00–2.5). A 5-year backtest shows a typical error of ±28.4%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–2.595% range
±28.4%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
20250.660.003.2
20260.480.003.0
20270.290.002.8
20280.110.002.6
20290.000.002.5

Chimney Swift Survey Routes in Missouri

Routes recording Chimney Swift in Missouri.
Cole Camp4419901971
Sni Mills3319901967
Gildehouse2919891978
Hamilton2219851972
Syracuse1720231969
Graydon1520221968
Kirksville920171994
Watson920231991
Union919991990
Washington819771967
Centertown820231973
Sedalia820231991
Gerald720222013
Kahoka619981967
Deventer520241967
Clementine520021974
Madison520221971
Rockingham520161969
Marshfield520161996
Millwood520221999
Clementine 2520062005
House Springs520232017
Cassville420241972
Bolckow419921967
Bennett420221997

Chimney Swift Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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