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

Vesper Sparrow In Great Basin

All regionsGreat BasinGrassland birds

Vesper Sparrow in Great Basin has surged: up 172% on the route-weighted index since 1970.

+172%Since 1970
212Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Vesper Sparrow has surged in Great Basin: up 172% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Vesper Sparrow in Great Basin is projected to rise about 20% by 2029 — from 8.4 in 2024 to a central estimate of 10 (95% range 4.8–15). A 5-year backtest shows a typical error of ±44.4%, with 100% of held-out values landing inside the 95% band.

+20%Change by 2029
10Projected 2029 index
4.8–1595% range
±44.4%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
20259.94.615
20269.94.715
202710.04.715
2028104.815
2029104.815

Routes In Great Basin

Routes recording Vesper Sparrow in Great Basin.
ZumwaltOREGON1272005
Charleston ReservoirNEVADA952024
Blitzen 2OREGON802024
RanchograndeNEVADA602024
HenryIDAHO591983
DuboisIDAHO582024
Flook LakeOREGON552024
Humboldt NfNEVADA532019
BuchananOREGON532024
Humboldt Nf 2NEVADA502024
PrincetonOREGON451985
Daniels ResIDAHO412019
LynnUTAH412023
Goose Creek Mtn.UTAH392023
HarringtonWASHINGTON362012
Dinner StaNEVADA351993
Bald Mtn.NEVADA342024
MidasNEVADA332024
Iron SpringsIDAHO312024
SheavilleOREGON312024
Sheldon NwrNEVADA302019
TriangleIDAHO262024
Blackft ResIDAHO262018
BlitzenOREGON261993
Catlow RimOREGON262024

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