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

Black-headed Grosbeak In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauGeneralists

Black-headed Grosbeak in Southern Rockies / Colorado Plateau has surged: up 92% on the route-weighted index since 1970.

+92%Since 1970
195Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Black-headed Grosbeak has surged in Southern Rockies / Colorado Plateau: up 92% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Black-headed Grosbeak in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2029, near 3.3 (95% range 2.5–4.1). A 5-year backtest shows a typical error of ±11.3%, with 100% of held-out values landing inside the 95% band.

-5%Change by 2029
3.3Projected 2029 index
2.5–4.195% range
±11.3%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
20253.22.34.0
20263.22.44.0
20273.22.44.1
20283.32.44.1
20293.32.54.1

Routes In Southern Rockies / Colorado Plateau

Routes recording Black-headed Grosbeak in Southern Rockies / Colorado Plateau.
Mesaverde NpCOLORADO392024
CokedaleCOLORADO312024
WalsenburgCOLORADO292024
AnimasCOLORADO212004
Mcphee Res.COLORADO192024
Main CanyonUTAH182024
Angel Fire 2NEW-MEXICO142024
MoabUTAH142024
PaoniaCOLORADO132024
NuclaCOLORADO132024
Douglas PassCOLORADO122024
Wilson CreekCOLORADO122024
Baxter PassCOLORADO122024
GallinasNEW-MEXICO112024
Mt. Taylor 2NEW-MEXICO112024
AnethUTAH112024
ZeniffARIZONA101973
TsaileARIZONA102023
Blackhead PkCOLORADO102021
Ojo SarcoNEW-MEXICO102024
Beck 2UTAH102018
Dry ParkARIZONA92024
Wet Mtns.COLORADO92024
Ant Flat-Ogden CanUTAH92023
La Sal 2UTAH92006

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