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Species · Wyoming · BBS 2025 Release · 1966–2024

Thick-billed Longspur Population Trend in Wyoming

All statesGeneralists

Thick-billed Longspur in Wyoming has surged: up 192% on the route-weighted index since 1970.

+192%Since 1970
38Routes In State
56Years

Notable Thick-billed Longspur Trends in Wyoming

long arc increasecomputed index

Thick-billed Longspur has surged in Wyoming: up 192% on the route-weighted index since 1970.

Thick-billed Longspur Population Forecast in Wyoming

If the recent trend holds, Thick-billed Longspur in Wyoming is projected to rise about 17% by 2029 — from 1.4 in 2024 to a central estimate of 1.6 (95% range 0.18–3.0). A 5-year backtest shows a typical error of ±40%, with 100% of held-out values landing inside the 95% band.

+17%Change by 2029
1.6Projected 2029 index
0.18–3.095% range
±40%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
20251.50.133.0
20261.60.143.0
20271.60.163.0
20281.60.173.0
20291.60.183.0

Thick-billed Longspur Survey Routes in Wyoming

Routes recording Thick-billed Longspur in Wyoming.
Shirley6520241992
Rock River6020221990
Harmony5320231982
Cheyenne3020241980
Pine Tree2619951980
Buford2120241978
Piney1919901982
Savageton1620192019
Sweetwater1220091981
Lusk1120231991
Newcastle1019881988
Glenrock919771968
Shawnee720151999
Otto619741974
Rozet519911991
Yoder519711969
Clark320242019
Harland Flat319951990
Natrona219861973
Seely 2220102010
Patrick Draw 5220042004
Upton219891988
Patrick Draw 4220022002
Rock Springs219781978
Chugwater220242024

Thick-billed Longspur Population Trend in Other States

coloradomontananebraskanorth-dakota

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