BirdAnalyst
Species · BCR 16 · BBS 2025 Release · 1966–2024

Horned Lark In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauGrassland birds

Horned Lark in Southern Rockies / Colorado Plateau has fallen sharply: down 59% on the route-weighted index since 1970.

-59%Since 1970
176Routes In Region
56Years

Notable Signals

long arc declinecomputed index

Horned Lark has fallen sharply in Southern Rockies / Colorado Plateau: down 59% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Horned Lark in Southern Rockies / Colorado Plateau is projected to fall about 54% by 2029 — from 16 in 2024 to a central estimate of 7.4 (95% range 0.00–16). A 5-year backtest shows a typical error of ±38.4%, with 80% of held-out values landing inside the 95% band.

-54%Change by 2029
7.4Projected 2029 index
0.00–1695% range
±38.4%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
20258.90.0618
20268.50.0017
20278.10.0017
20287.70.0017
20297.40.0016

Routes In Southern Rockies / Colorado Plateau

Routes recording Horned Lark in Southern Rockies / Colorado Plateau.
Mt TrumbullARIZONA1671993
Many FarmsARIZONA1582006
DatilNEW-MEXICO1581995
MesitaCOLORADO1212024
San LuisCOLORADO992024
BlancaCOLORADO921987
Corona EastNEW-MEXICO921995
BasinCOLORADO882024
WestwaterUTAH872024
Gilson ButteUTAH852004
Rose WellsARIZONA841978
AntonitoCOLORADO842004
Navajo TrailARIZONA762024
YampaiARIZONA751977
SeligmanARIZONA742024
MoscaCOLORADO742024
NageesiNEW-MEXICO682024
SanosteeNEW-MEXICO682024
OraibiARIZONA642022
ShiprockNEW-MEXICO642024
Willow CreekUTAH632024
Horse SpgsNEW-MEXICO602024
TorreonNEW-MEXICO592024
WaldenCOLORADO582024
Glen CanyonUTAH542024

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