BirdAnalyst
Species · Arizona · BBS 2025 Release · 1966–2024

Olive Warbler Population Trend in Arizona

All statesGeneralists

Olive Warbler in Arizona has surged: up 273% on the route-weighted index since 1979.

+273%Since 1979
13Routes In State
41Years

Notable Olive Warbler Trends in Arizona

long arc increasecomputed index

Olive Warbler has surged in Arizona: up 273% on the route-weighted index since 1979.

Olive Warbler Population Forecast in Arizona

If the recent trend holds, Olive Warbler in Arizona is projected to rise about 211% by 2029 — from 0.11 in 2024 to a central estimate of 0.35 (95% range 0.10–0.60). A 5-year backtest shows a typical error of ±57.8%, with 60% of held-out values landing inside the 95% band.

+211%Change by 2029
0.35Projected 2029 index
0.10–0.6095% range
±57.8%Backtest error
19772029
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
20250.330.080.58
20260.340.090.59
20270.340.100.59
20280.350.100.60
20290.350.100.60

Olive Warbler Survey Routes in Arizona

Routes recording Olive Warbler in Arizona.
Mt. Graham1420231995
Sprucedale620232005
Forest Lakes320212001
Prescott320181992
Pinetop220222021
Portal220241977
Carr Mtn220181989
Alpine220222002
Happy Jack220242001
Williams220012001
Tonto Vill.120172001
Rucker120042004
Aztec Peak119771977

Olive Warbler Population Trend in Other States

new-mexico

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