Guild · Michigan · BBS 2025 Release · 1966–2024
Grassland Birds In Michigan
13 species in this guild. As a group they are -84% since 1968.
Guild Signals
guild collapsecomputed index
Grassland birds as a group have collapsed in Michigan, down 84% since 1968.
Forecast
If the recent trend holds, Grassland birds in Michigan is projected to fall about 100% by 2029 — from 1.3 in 2024 to a central estimate of 0.00 (95% range 0.00–1.2). A 5-year backtest shows a typical error of ±57.9%, with 100% of held-out values landing inside the 95% band.
-100%Change by 2029
0.00Projected 2029 index
0.00–1.295% range
±57.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.38 | 0.00 | 1.5 |
| 2026 | 0.26 | 0.00 | 1.4 |
| 2027 | 0.15 | 0.00 | 1.3 |
| 2028 | 0.04 | 0.00 | 1.2 |
| 2029 | 0.00 | 0.00 | 1.2 |
Member Species In Michigan
| Northern Bobwhite | Odontophoridae | -100% |
| Western Meadowlark | Icteridae | -98% |
| Ring-necked Pheasant | Phasianidae | -97% |
| Henslow's Sparrow | Passerellidae | -95% |
| Grasshopper Sparrow | Passerellidae | -93% |
| Vesper Sparrow | Passerellidae | -92% |
| Eastern Meadowlark | Icteridae | -86% |
| Savannah Sparrow | Passerellidae | -85% |
| Bobolink | Icteridae | -82% |
| Sedge Wren | Troglodytidae | -74% |
| Upland Sandpiper | Scolopacidae | -64% |
| Dickcissel | Cardinalidae | -63% |
| Horned Lark | Alaudidae | -38% |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.