BirdAnalyst
Species · New Mexico · BBS 2025 Release · 1966–2024

Black-billed Magpie Population Trend in New Mexico

All statesGeneralists

Black-billed Magpie in New Mexico has declined: down 41% on the route-weighted index since 1970.

-41%Since 1970
22Routes In State
56Years

Notable Black-billed Magpie Trends in New Mexico

No notable trend signals for Black-billed Magpie in New Mexico. See the full index history below.

Black-billed Magpie Population Forecast in New Mexico

If the recent trend holds, Black-billed Magpie in New Mexico is projected to rise about 17% by 2029 — from 1.1 in 2024 to a central estimate of 1.3 (95% range 0.00–3.5). A 5-year backtest shows a typical error of ±20.2%, with 100% of held-out values landing inside the 95% band.

+17%Change by 2029
1.3Projected 2029 index
0.00–3.595% range
±20.2%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
20251.40.003.6
20261.40.003.6
20271.40.003.5
20281.30.003.5
20291.30.003.5

Black-billed Magpie Survey Routes in New Mexico

Routes recording Black-billed Magpie in New Mexico.
Aztec5419891988
Farmington4119871975
Stinking Lk.3519991992
Ojo Sarco2920241968
Angel Fire 21620242005
La Plata 21020162014
Pecos820171991
Cebolla620231977
Angel Fire620021992
Clovis520012000
Dulce420242000
Nageesi320082003
Farley320141979
Shiprock320031996
La Plata320131990
Capulin219941994
Sedan220012001
Gallinas220241992
Grenville120011968
Salt Lake 2120102003
La Cienega120191999
Maxwell120171996

Black-billed Magpie Population Trend in Other States

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