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

Song Sparrow In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsGeneralists

Song Sparrow in Sonoran and Mojave Deserts has surged: up 99% on the route-weighted index since 1970.

+99%Since 1970
30Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Song Sparrow has surged in Sonoran and Mojave Deserts: up 99% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Song Sparrow in Sonoran and Mojave Deserts is projected to rise about 22% by 2029 — from 0.67 in 2024 to a central estimate of 0.81 (95% range 0.17–1.5). A 5-year backtest shows a typical error of ±108.5%, with 80% of held-out values landing inside the 95% band.

+22%Change by 2029
0.81Projected 2029 index
0.17–1.595% range
±108.5%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
20250.790.151.4
20260.800.161.4
20270.800.161.4
20280.810.171.4
20290.810.171.5

Routes In Sonoran and Mojave Deserts

Routes recording Song Sparrow in Sonoran and Mojave Deserts.
NilandCALIFORNIA112024
OnyxCALIFORNIA72001
Red Rock 2ARIZONA52016
CoolidgeARIZONA41975
RivieraARIZONA42024
Cibola LakeARIZONA42019
Imperial DamCALIFORNIA42006
BrawleyCALIFORNIA42012
FlorenceARIZONA31988
DatelandARIZONA32016
TecopaCALIFORNIA32018
Alamo RiverCALIFORNIA32018
LagunaARIZONA22023
ArabyARIZONA22022
Cutter 2ARIZONA22018
Palo VerdeCALIFORNIA22024
PearblossomCALIFORNIA22024
Palo VerdeARIZONA12013
Red RockARIZONA12014
Casa GrandeARIZONA12016
Cactus ForestARIZONA12021
Palo Verde 2ARIZONA12024
Hope 2ARIZONA12018
Parker DamCALIFORNIA12007
GlamisCALIFORNIA12018

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