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

Ruddy Duck In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsWaterfowl

Ruddy Duck in Sonoran and Mojave Deserts has collapsed: down 77% on the route-weighted index since 1977.

-77%Since 1977
7Routes In Region
34Years

Notable Signals

long arc declinecomputed index

Ruddy Duck has collapsed in Sonoran and Mojave Deserts: down 77% on the route-weighted index since 1977.

Forecast

If the recent trend holds, Ruddy Duck in Sonoran and Mojave Deserts is projected to fall about 100% by 2029 — from 0.07 in 2024 to a central estimate of 0.00 (95% range 0.00–2.9). A 5-year backtest shows a typical error of ±848.8%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–2.995% range
±848.8%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
20250.000.002.9
20260.000.002.9
20270.000.002.9
20280.000.002.9
20290.000.002.9

Routes In Sonoran and Mojave Deserts

Routes recording Ruddy Duck in Sonoran and Mojave Deserts.
NilandCALIFORNIA652021
Haiwee ResCALIFORNIA61992
FlorenceARIZONA51972
ArabyARIZONA22023
Ash MeadowsNEVADA22024
AjoARIZONA12001
Willow Beach 2ARIZONA12021

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