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

White-throated Swift In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsAerial insectivores

White-throated Swift in Sonoran and Mojave Deserts has collapsed: down 92% on the route-weighted index since 1970.

-92%Since 1970
58Routes In Region
56Years

Notable Signals

long arc declinecomputed index

White-throated Swift has collapsed in Sonoran and Mojave Deserts: down 92% on the route-weighted index since 1970.

Forecast

If the recent trend holds, White-throated Swift in Sonoran and Mojave Deserts is projected to stay roughly flat through 2029, near 0.98 (95% range 0.00–2.5). A 5-year backtest shows a typical error of ±1301.5%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.98Projected 2029 index
0.00–2.595% range
±1301.5%Backtest error
19682029
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
20250.990.002.6
20260.990.002.6
20270.990.002.6
20280.980.002.5
20290.980.002.5

Routes In Sonoran and Mojave Deserts

Routes recording White-throated Swift in Sonoran and Mojave Deserts.
DatelandARIZONA822016
Squaw PeakARIZONA351970
Parker DamCALIFORNIA162007
Cutter 2ARIZONA132018
Joshua Tree 2CALIFORNIA112014
FlorenceARIZONA71971
AntaresARIZONA62002
Ajo 2ARIZONA62022
Calif CityCALIFORNIA51977
GlamisCALIFORNIA52018
BlytheCALIFORNIA51979
UbehebeCALIFORNIA41999
OnyxCALIFORNIA41998
Coachella CnCALIFORNIA42013
Lone PineCALIFORNIA42011
VicksburgARIZONA31988
AjoARIZONA32001
Gila BendARIZONA32022
ArabyARIZONA32006
WildroseCALIFORNIA32004
TronaCALIFORNIA31997
Iron MtnsCALIFORNIA32018
Imperial DamCALIFORNIA31992
Val Of FireNEVADA32021
LagunaARIZONA22011

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