BirdAnalyst
Species · BCR 10 · BBS 2026 Release · 1966–2025

White-faced Ibis In Northern Rockies

All regionsNorthern RockiesWetland birds

White-faced Ibis in Northern Rockies has increased: up 28% on the route-weighted index since 1992.

+28%Since 1992TrendPercent 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 →
11Routes 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 →
26YearsYears 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 Northern Rockies. See the full index history below.

White-faced Ibis In Northern Rockies Population Forecast

If the recent trend holds, White-faced Ibis in Northern Rockies is projected to stay roughly flat through 2030, near 0.26 (95% range 0.00–0.65). A 5-year backtest shows a typical error of ±1676.1%, with 60% of held-out values landing inside the 95% band.

n/aChange 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 →
0.26Projected 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 →
0.00–0.6595% 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 →
±1676.1%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 Northern Rockies is projected to stay roughly flat through 2030, near 0.26 (95% range 0.00–0.65). A 5-year backtest shows a typical error of ±1676.1%, with 60% of held-out values landing inside the 95% band.19832030
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 →
20260.250.000.64
20270.250.000.64
20280.250.000.65
20290.260.000.65
20300.260.000.65

Routes In Northern Rockies

Routes recording White-faced Ibis in Northern Rockies.
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 →
Neponset ResUTAH372018
Red RockMONTANA262022
RandolphUTAH122022
Crawford MtsUTAH72017
SeedskadeeWYOMING31994
LayCOLORADO22001
BeaverheadMONTANA22025
FontenelleWYOMING22007
TensleepWYOMING12009
HarmonyWYOMING12021
Carter 2WYOMING12025

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