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

Dickcissel Population Trend in Iowa

All statesGrassland birds

Dickcissel in Iowa has declined: down 36% on the route-weighted index since 1969.

-36%Since 1969
39Routes In State
57Years

Notable Dickcissel Trends in Iowa

No notable trend signals for Dickcissel in Iowa. See the full index history below.

Dickcissel Population Forecast in Iowa

If the recent trend holds, Dickcissel in Iowa is projected to fall about 14% by 2029 — from 43 in 2024 to a central estimate of 37 (95% range 0.19–73). A 5-year backtest shows a typical error of ±41.6%, with 100% of held-out values landing inside the 95% band.

-14%Change by 2029
37Projected 2029 index
0.19–7395% range
±41.6%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
2025381.274
2026370.9674
2027370.7074
2028370.4573
2029370.1973

Dickcissel Survey Routes in Iowa

Routes recording Dickcissel in Iowa.
Bedford14620181968
Brooklyn13320221967
College Spgs 212720232005
College Spgs11820041967
Williamsburg11720231967
Wales11620181967
Washta9120141967
Bryant8820241967
Kanawha8520241967
Scranton8020241967
Neola7520161968
Panther7020241967
Red Rock6320241968
Tipton6120241993
Gaza5720231969
West Liberty5520241968
Dinsdale5520241968
Zearing4619951967
Hudson4120221967
Mccallsburg4020241996
Exline3820241974
Lafayette3820242003
Titonka3720241968
Cedar Valley3519971967
Maquoketa3520241967

Dickcissel Population Trend in Other States

alabamaarkansascoloradodelawaregeorgiaillinoisindianakansaskentuckylouisianamarylandmichiganminnesotamississippimissourimontananebraskanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniasouth-carolinasouth-dakotatennesseetexasvirginiawest-virginiawisconsinwyoming

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