BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

Gray Vireo In Great Basin

All regionsGreat BasinForest birds

Gray Vireo in Great Basin has surged: up 192% on the route-weighted index since 1998.

+192%Since 1998
10Routes In Region
25Years

Notable Signals

long arc increasecomputed index

Gray Vireo has surged in Great Basin: up 192% on the route-weighted index since 1998.

Forecast

If the recent trend holds, Gray Vireo in Great Basin is projected to rise about 51% by 2029 — from 0.09 in 2024 to a central estimate of 0.13 (95% range 0.03–0.23). A 5-year backtest shows a typical error of ±42.6%, with 80% of held-out values landing inside the 95% band.

+51%Change by 2029
0.13Projected 2029 index
0.03–0.2395% range
±42.6%Backtest error
19962029
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
20250.110.020.21
20260.120.020.21
20270.120.030.22
20280.130.030.22
20290.130.030.23

Routes In Great Basin

Routes recording Gray Vireo in Great Basin.
BerylUTAH92024
NewcastleUTAH42022
VernonUTAH22024
WillisNEVADA12021
Comins LakeNEVADA12013
Meadow VallyNEVADA12024
Gold HillUTAH12023
Indian PeakUTAH12006
Jericho JunctionUTAH12023
Tule ValleyUTAH12012

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