BirdAnalyst
Species · BCR 35 · BBS 2025 Release · 1966–2024

Summer Tanager In Chihuahuan Desert

All regionsChihuahuan DesertGeneralists

Summer Tanager in Chihuahuan Desert has surged: up 186% on the route-weighted index since 1970.

+186%Since 1970
32Routes In Region
51Years

Notable Signals

long arc increasecomputed index

Summer Tanager has surged in Chihuahuan Desert: up 185% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Summer Tanager in Chihuahuan Desert is projected to rise about 77% by 2029 — from 0.52 in 2024 to a central estimate of 0.91 (95% range 0.40–1.4). A 5-year backtest shows a typical error of ±72.9%, with 100% of held-out values landing inside the 95% band.

+77%Change by 2029
0.91Projected 2029 index
0.40–1.495% range
±72.9%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
20250.860.351.4
20260.880.361.4
20270.890.381.4
20280.900.391.4
20290.910.401.4

Routes In Chihuahuan Desert

Routes recording Summer Tanager in Chihuahuan Desert.
Quitman Cyn.TEXAS122009
Red RockNEW-MEXICO42024
MesillaNEW-MEXICO42000
Bear MtnTEXAS42012
ToyahvaleTEXAS42024
Devils R CynTEXAS32024
LaborcitaNEW-MEXICO22019
QueenNEW-MEXICO22019
Hot SpringsTEXAS22001
OzonaTEXAS22022
Casa PiedraTEXAS22023
MarathonTEXAS22023
Quitman Canyon 2TEXAS22024
DemingNEW-MEXICO11969
EscondidaNEW-MEXICO12018
Lake ValleyNEW-MEXICO12023
Laborcita 2NEW-MEXICO12022
ComstockTEXAS12023
Black GapTEXAS12018
ShafterTEXAS11982
LongfellowTEXAS12024
AltudaTEXAS12008
ValentineTEXAS11986
Delaware CrkTEXAS12015
SlaughterTEXAS12014

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