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

Tree Swallow In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsAerial insectivores

Tree Swallow in Sonoran and Mojave Deserts has declined: down 34% on the route-weighted index since 1976.

-34%Since 1976
5Routes In Region
23Years

Notable Signals

No notable trend signals for Tree Swallow in Sonoran and Mojave Deserts. See the full index history below.

Forecast

If the recent trend holds, Tree Swallow in Sonoran and Mojave Deserts is projected to fall about 55% by 2012 — from 0.14 in 2007 to a central estimate of 0.06 (95% range 0.00–0.16). A 5-year backtest shows a typical error of ±53.4%, with 80% of held-out values landing inside the 95% band.

-55%Change by 2012
0.06Projected 2012 index
0.00–0.1695% range
±53.4%Backtest error
19722012
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
20080.070.000.17
20090.070.000.17
20100.070.000.16
20110.060.000.16
20120.060.000.16

Routes In Sonoran and Mojave Deserts

Routes recording Tree Swallow in Sonoran and Mojave Deserts.
Kelso ValleyCALIFORNIA52007
OnyxCALIFORNIA42001
Lone PineCALIFORNIA21995
Calif CityCALIFORNIA11996
NilandCALIFORNIA11976

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