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

Summer Tanager In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsGeneralists

Summer Tanager in Sonoran and Mojave Deserts has surged: up 126% on the route-weighted index since 1982.

+126%Since 1982
9Routes In Region
24Years

Notable Signals

long arc increasecomputed index

Summer Tanager has surged in Sonoran and Mojave Deserts: up 126% on the route-weighted index since 1982.

Forecast

If the recent trend holds, Summer Tanager in Sonoran and Mojave Deserts is projected to rise about 210% by 2026 — from 0.05 in 2021 to a central estimate of 0.16 (95% range 0.00–0.32). A 5-year backtest shows a typical error of ±72.9%, with 20% of held-out values landing inside the 95% band.

+210%Change by 2026
0.16Projected 2026 index
0.00–0.3295% range
±72.9%Backtest error
19762026
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
20220.150.000.31
20230.150.000.31
20240.150.000.31
20250.160.000.32
20260.160.000.32

Routes In Sonoran and Mojave Deserts

Routes recording Summer Tanager in Sonoran and Mojave Deserts.
Cutter 2ARIZONA132018
TecopaCALIFORNIA22021
FlorenceARIZONA11988
RivieraARIZONA12016
Casa GrandeARIZONA12011
OnyxCALIFORNIA12001
PearblossomCALIFORNIA11997
Kelso ValleyCALIFORNIA12002
BrawleyCALIFORNIA11988

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