BirdAnalyst
Species · BCR 33 · BBS 2025 Release · 1966–2024

White-faced Ibis In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsWetland birds

White-faced Ibis in Sonoran and Mojave Deserts has surged: up 131% on the route-weighted index since 1985.

+131%Since 1985
7Routes In Region
41Years

Notable Signals

long arc increasecomputed index

White-faced Ibis has surged in Sonoran and Mojave Deserts: up 130% on the route-weighted index since 1985.

Forecast

If the recent trend holds, White-faced Ibis in Sonoran and Mojave Deserts is projected to rise about 38% by 2029 — from 8.1 in 2024 to a central estimate of 11 (95% range 0.00–29). A 5-year backtest shows a typical error of ±814.6%, with 100% of held-out values landing inside the 95% band.

+38%Change by 2029
11Projected 2029 index
0.00–2995% range
±814.6%Backtest error
19812029
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
2025100.0028
2026110.0028
2027110.0029
2028110.0029
2029110.0029

Routes In Sonoran and Mojave Deserts

Routes recording White-faced Ibis in Sonoran and Mojave Deserts.
BrawleyCALIFORNIA2052012
NilandCALIFORNIA1852024
Alamo RiverCALIFORNIA1221992
Palo VerdeCALIFORNIA582024
Cibola LakeARIZONA182012
Calif CityCALIFORNIA132012
Ash MeadowsNEVADA12016

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