BirdAnalyst
Species · BCR 32 · BBS 2025 Release · 1966–2024

White-faced Ibis In Coastal California

All regionsCoastal CaliforniaWetland birds

White-faced Ibis in Coastal California has surged: up 58× on the route-weighted index since 1986.

58×Since 1986
18Routes In Region
37Years

Notable Signals

long arc increasecomputed index

White-faced Ibis has surged in Coastal California: up 58× on the route-weighted index since 1986.

Forecast

If the recent trend holds, White-faced Ibis in Coastal California is projected to rise about 247% by 2029 — from 1.1 in 2024 to a central estimate of 3.8 (95% range 0.04–7.6). A 5-year backtest shows a typical error of ±275.2%, with 100% of held-out values landing inside the 95% band.

+247%Change by 2029
3.8Projected 2029 index
0.04–7.695% range
±275.2%Backtest error
19722029
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
20253.50.007.3
20263.60.007.4
20273.70.007.5
20283.80.007.6
20293.80.047.6

Routes In Coastal California

Routes recording White-faced Ibis in Coastal California.
GlennCALIFORNIA2052021
ArvinCALIFORNIA1502022
AtwaterCALIFORNIA502012
OrlandCALIFORNIA352004
OrovilleCALIFORNIA352013
ZamoraCALIFORNIA302017
Ora LomaCALIFORNIA302024
Red BluffCALIFORNIA292014
Staten Is.CALIFORNIA222014
HughsonCALIFORNIA172024
WestleyCALIFORNIA142023
Buena VistaCALIFORNIA92019
PenningtonCALIFORNIA72014
MorenoCALIFORNIA52022
Jofegan 2CALIFORNIA52024
TranquillityCALIFORNIA22004
RiovistaCALIFORNIA11972
Anza 2CALIFORNIA12021

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