BirdAnalyst
Species · North Dakota · BBS 2026 Release · 1966–2025

White-faced Ibis Population Trend in North Dakota

All statesWetland birds

White-faced Ibis in North Dakota has surged: up 728% on the route-weighted index since 2006.

+728%Since 2006TrendPercent 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 →
16Routes 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 North 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 North Dakota: up 728% on the route-weighted index since 2006.

White-faced Ibis Survey Routes in North Dakota

Routes recording White-faced Ibis in North 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 →
Wild Rose8520252024
Stanley1420242024
Niles620252018
Buchanan420232017
Lake George320211999
Montpelier320252021
Sheyenne Lk320242024
Turtle Mtns320162016
Forman220232006
Wimbledon220212018
Horsehead Lk220252012
Webster220142014
Powers Lake120252025
Cooperstown120212021
Braddock120232014
Denbigh120242017

White-faced Ibis Population Trend in Other States

arizonacaliforniacoloradoidahokansaslouisianamontananebraskanevadanew-mexicooklahomaoregonsouth-dakotatexasutahwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.