BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

Vesper Sparrow In Badlands and Prairies

All regionsBadlands and PrairiesGrassland birds

Vesper Sparrow in Badlands and Prairies has surged: up 135% on the route-weighted index since 1969.

+135%Since 1969
137Routes In Region
57Years

Notable Signals

long arc increasecomputed index

Vesper Sparrow has surged in Badlands and Prairies: up 135% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Vesper Sparrow in Badlands and Prairies is projected to stay roughly flat through 2029, near 18 (95% range 11–26). A 5-year backtest shows a typical error of ±5.4%, with 100% of held-out values landing inside the 95% band.

+9%Change by 2029
18Projected 2029 index
11–2695% range
±5.4%Backtest error
19672029
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
2025181125
2026181125
2027181125
2028181126
2029181126

Routes In Badlands and Prairies

Routes recording Vesper Sparrow in Badlands and Prairies.
CusterMONTANA992022
Custer 2MONTANA872024
ShawmutMONTANA852024
BrusettMONTANA662024
WinnettMONTANA662023
Eagle ButteSOUTH-DAKOTA622015
LeroyMONTANA562024
DickinsonNORTH-DAKOTA562024
Two DotMONTANA552024
RoundupMONTANA552024
RoyMONTANA542024
BrandenbergMONTANA532019
Wheat BasinMONTANA502024
MeadowdaleWYOMING472014
SavageMONTANA432021
IsabelSOUTH-DAKOTA412015
Flatwillow 2MONTANA402023
Dinosaurs H.M.MONTANA402024
BucknumWYOMING382024
Dunn CenterNORTH-DAKOTA372024
FlatwillowMONTANA362008
PromiseSOUTH-DAKOTA362015
SeelyWYOMING352000
Reed PointMONTANA342024
LindsayMONTANA342024

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