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

Pied-billed Grebe In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsWetland birds

Pied-billed Grebe in Sonoran and Mojave Deserts has surged: up 227% on the route-weighted index since 1979.

+227%Since 1979
14Routes In Region
44Years

Notable Signals

long arc increasecomputed index

Pied-billed Grebe has surged in Sonoran and Mojave Deserts: up 227% on the route-weighted index since 1979.

Forecast

If the recent trend holds, Pied-billed Grebe in Sonoran and Mojave Deserts is projected to rise about 65% by 2028 — from 0.13 in 2023 to a central estimate of 0.22 (95% range 0.00–0.67). A 5-year backtest shows a typical error of ±50.7%, with 100% of held-out values landing inside the 95% band.

+65%Change by 2028
0.22Projected 2028 index
0.00–0.6795% range
±50.7%Backtest error
19762028
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
20240.210.000.66
20250.210.000.66
20260.220.000.66
20270.220.000.67
20280.220.000.67

Routes In Sonoran and Mojave Deserts

Routes recording Pied-billed Grebe in Sonoran and Mojave Deserts.
Cibola LakeARIZONA42022
Willow Beach 2ARIZONA42021
ArabyARIZONA22023
LagunaARIZONA12015
Alamo Res.ARIZONA12023
Haiwee ResCALIFORNIA12000
Palo VerdeCALIFORNIA12019
NilandCALIFORNIA12023
BlytheCALIFORNIA11976
Imperial DamCALIFORNIA12006
Lone PineCALIFORNIA11993
BrawleyCALIFORNIA11988
BeattyNEVADA11986
Ash MeadowsNEVADA12019

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