BirdAnalyst
Species · South Dakota · BBS 2025 Release · 1966–2024

White-faced Ibis Population Trend in South Dakota

All statesWetland birds

White-faced Ibis in South Dakota has surged: up 105% on the route-weighted index since 2008.

+105%Since 2008TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
8Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
16YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable White-faced Ibis Trends in South DakotaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

White-faced Ibis has surged in South Dakota: up 105% on the route-weighted index since 2008.

White-faced Ibis Survey Routes in South Dakota

Routes recording White-faced Ibis in South Dakota.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
White Lake1820082000
Turton720072007
Cottonwood620102010
Crow Creek320232021
Broadland120132012
Britton120212021
Forbes120242008
Gettysburg120222011

White-faced Ibis Population Trend in Other States

arizonacaliforniacoloradoidahokansaslouisianamontananebraskanevadanew-mexiconorth-dakotaoklahomaoregontexasutahwyoming

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