BirdAnalyst
Species · BCR 19 · BBS 2026 Release · 1966–2025

White-faced Ibis In Central Mixed Grass Prairie

All regionsCentral Mixed Grass PrairieWetland birds

White-faced Ibis in Central Mixed Grass Prairie has edged down: down 17% on the route-weighted index since 1976.

-17%Since 1976TrendPercent 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 →
12Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
36YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for White-faced Ibis in Central Mixed Grass Prairie. See the full index history below.

White-faced Ibis In Central Mixed Grass Prairie Population Forecast

If the recent trend holds, White-faced Ibis in Central Mixed Grass Prairie is projected to rise about 74% by 2030 — from 0.24 in 2025 to a central estimate of 0.41 (95% range 0.00–1.0). A 5-year backtest shows a typical error of ±855.7%, with 100% of held-out values landing inside the 95% band.

+74%Change by 2030TrendPercent 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 →
0.41Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–1.095% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±855.7%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, White-faced Ibis in Central Mixed Grass Prairie is projected to rise about 74% by 2030 — from 0.24 in 2025 to a central estimate of 0.41 (95% range 0.00–1.0). A 5-year backtest shows a typical error of ±855.7%, with 100% of held-out values landing inside the 95% band.19702030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20260.390.000.99
20270.400.000.99
20280.400.001.00
20290.410.001.0
20300.410.001.0

Routes In Central Mixed Grass Prairie

Routes recording White-faced Ibis in Central Mixed Grass Prairie.
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 →
JetOKLAHOMA222013
AlbertKANSAS142025
BrownleeNEBRASKA142018
TableNEBRASKA132008
KennedyNEBRASKA72016
Swan LakeNEBRASKA32021
CoatsKANSAS21996
GordonNEBRASKA22025
Crescent LkNEBRASKA12025
Wheeler CoNEBRASKA12024
BassettNEBRASKA12019
HaskellTEXAS12011

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