BirdAnalyst
Species · BCR 15 · BBS 2025 Release · 1966–2024

Vesper Sparrow In Sierra Nevada

All regionsSierra NevadaGrassland birds

Vesper Sparrow in Sierra Nevada has held roughly steady: up 2% on the route-weighted index since 1973.

+2%Since 1973
11Routes In Region
51Years

Notable Signals

No notable trend signals for Vesper Sparrow in Sierra Nevada. See the full index history below.

Forecast

If the recent trend holds, Vesper Sparrow in Sierra Nevada is projected to rise about 79% by 2029 — from 0.95 in 2024 to a central estimate of 1.7 (95% range 0.01–3.4). A 5-year backtest shows a typical error of ±236.7%, with 60% of held-out values landing inside the 95% band.

+79%Change by 2029
1.7Projected 2029 index
0.01–3.495% range
±236.7%Backtest error
19702029
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
20251.70.003.4
20261.70.003.4
20271.70.003.4
20281.70.013.4
20291.70.013.4

Routes In Sierra Nevada

Routes recording Vesper Sparrow in Sierra Nevada.
GoumazCALIFORNIA182011
Last ChanceCALIFORNIA172019
SattleyCALIFORNIA152024
Little TruckeeCALIFORNIA92023
WoodfordsCALIFORNIA22017
LakeshoreCALIFORNIA22006
CrestviewCALIFORNIA22024
Eagle LakeCALIFORNIA12022
DardanelleCALIFORNIA12019
RivertonCALIFORNIA11975
ChilcootCALIFORNIA12024

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