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

Great Egret In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsWetland birds

Great Egret in Sonoran and Mojave Deserts has fallen sharply: down 57% on the route-weighted index since 1976.

-57%Since 1976
21Routes In Region
50Years

Notable Signals

long arc declinecomputed index

Great Egret has fallen sharply in Sonoran and Mojave Deserts: down 57% on the route-weighted index since 1976.

Forecast

If the recent trend holds, Great Egret in Sonoran and Mojave Deserts is projected to fall about 55% by 2029 — from 0.63 in 2024 to a central estimate of 0.28 (95% range 0.00–1.9). A 5-year backtest shows a typical error of ±64.1%, with 100% of held-out values landing inside the 95% band.

-55%Change by 2029
0.28Projected 2029 index
0.00–1.995% range
±64.1%Backtest error
19732029
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
20250.370.001.9
20260.350.001.9
20270.330.001.9
20280.300.001.9
20290.280.001.9

Routes In Sonoran and Mojave Deserts

Routes recording Great Egret in Sonoran and Mojave Deserts.
BrawleyCALIFORNIA132012
NilandCALIFORNIA112024
Palo VerdeCALIFORNIA52024
BeattyNEVADA52014
LagunaARIZONA42013
Havasu LakeCALIFORNIA41973
DatelandARIZONA32024
Casa GrandeARIZONA32019
Palo Verde 2ARIZONA32022
Ash MeadowsNEVADA32014
Red RockARIZONA21999
Alamo RiverCALIFORNIA22018
Cibola LakeARIZONA12016
Palo VerdeARIZONA12013
ArabyARIZONA12022
HopeARIZONA12009
Red Rock 2ARIZONA12019
OnyxCALIFORNIA11996
Parker DamCALIFORNIA11973
Imperial DamCALIFORNIA12010
Lone PineCALIFORNIA11997

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