Species · New Mexico · BBS 2025 Release · 1966–2024
Grasshopper Sparrow Population Trend in New Mexico
Grasshopper Sparrow in New Mexico has surged: up 135% on the route-weighted index since 1974.
+135%Since 1974
21Routes In State
45Years
Notable Grasshopper Sparrow Trends in New Mexico
long arc increasecomputed index
Grasshopper Sparrow has surged in New Mexico: up 135% on the route-weighted index since 1974.
Grasshopper Sparrow Population Forecast in New Mexico
If the recent trend holds, Grasshopper Sparrow in New Mexico is projected to rise about 65% by 2029 — from 0.28 in 2024 to a central estimate of 0.47 (95% range 0.00–1.0). A 5-year backtest shows a typical error of ±412.1%, with 100% of held-out values landing inside the 95% band.
+65%Change by 2029
0.47Projected 2029 index
0.00–1.095% range
±412.1%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.45 | 0.00 | 0.99 |
| 2026 | 0.45 | 0.00 | 1.00 |
| 2027 | 0.46 | 0.00 | 1.0 |
| 2028 | 0.46 | 0.00 | 1.0 |
| 2029 | 0.47 | 0.00 | 1.0 |
Grasshopper Sparrow Survey Routes in New Mexico
| Farley | 6 | 2024 | 1994 |
| Pastura | 6 | 2015 | 1994 |
| Floyd | 4 | 2019 | 2008 |
| Capulin | 3 | 1994 | 1994 |
| Grenville | 3 | 2024 | 1968 |
| Caprock | 3 | 2010 | 1987 |
| Clovis | 3 | 2024 | 1993 |
| Cooley Lake | 2 | 2023 | 1993 |
| Maxwell | 2 | 2018 | 1997 |
| Gallinas | 2 | 1993 | 1993 |
| Rosebud | 2 | 2018 | 1994 |
| Bitter Lake | 2 | 1997 | 1997 |
| Sabinoso | 2 | 2019 | 1980 |
| Lake Valley | 2 | 2007 | 1991 |
| Roswell | 1 | 2023 | 1987 |
| Sedan | 1 | 2021 | 1995 |
| Variadero | 1 | 1999 | 1994 |
| Pep | 1 | 2024 | 1992 |
| Hobbs | 1 | 2017 | 1994 |
| Hatchet Peak | 1 | 2023 | 2022 |
| Logan | 1 | 2017 | 2017 |
Grasshopper Sparrow Population Trend in Other States
alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.