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

Lark Sparrow In Great Basin

All regionsGreat BasinGrassland birds

Lark Sparrow in Great Basin has surged: up 163% on the route-weighted index since 1970.

+163%Since 1970
207Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Lark Sparrow has surged in Great Basin: up 163% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Lark Sparrow in Great Basin is projected to fall about 11% by 2029 — from 4.5 in 2024 to a central estimate of 4.0 (95% range 2.5–5.5). A 5-year backtest shows a typical error of ±18.9%, with 60% of held-out values landing inside the 95% band.

-11%Change by 2029
4.0Projected 2029 index
2.5–5.595% range
±18.9%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
20253.92.45.4
20263.92.45.4
20273.92.45.4
20283.92.45.5
20294.02.55.5

Routes In Great Basin

Routes recording Lark Sparrow in Great Basin.
PromontoryUTAH772024
LeamingtonUTAH752017
Chimney Res.NEVADA612024
Trout CreekOREGON572021
Alvord LakeOREGON562024
Majors PlaceNEVADA352024
WendoverUTAH352011
RanchograndeNEVADA252024
IngallsCALIFORNIA221999
Pine CreekUTAH222023
GrantsvilleUTAH202024
Piute MdwsNEVADA192024
Catlow RimOREGON192024
Goose Creek Mtn.UTAH192023
MidasNEVADA182024
SheavilleOREGON182024
Horn RapidsWASHINGTON172024
Glenns FerryIDAHO161986
Harney LakeOREGON152024
Three ForksOREGON142024
Timpie SpgUTAH142003
Gold HillUTAH132024
VernonUTAH132024
CliveUTAH132013
RichlandWASHINGTON132024

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