Guild · Tennessee · BBS 2025 Release · 1966–2024
Grassland Birds In Tennessee
6 species in this guild. As a group they are -86% since 1968.
Guild Signals
guild collapsecomputed index
Grassland birds as a group have collapsed in Tennessee, down 86% since 1968.
Forecast
If the recent trend holds, Grassland birds in Tennessee is projected to fall about 100% by 2029 — from 2.1 in 2024 to a central estimate of 0.00 (95% range 0.00–1.9). A 5-year backtest shows a typical error of ±67.5%, with 80% of held-out values landing inside the 95% band.
-100%Change by 2029
0.00Projected 2029 index
0.00–1.995% range
±67.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.23 | 0.00 | 2.1 |
| 2026 | 0.00 | 0.00 | 1.9 |
| 2027 | 0.00 | 0.00 | 1.9 |
| 2028 | 0.00 | 0.00 | 1.9 |
| 2029 | 0.00 | 0.00 | 1.9 |
Member Species In Tennessee
| Northern Bobwhite | Odontophoridae | -95% |
| Grasshopper Sparrow | Passerellidae | -89% |
| Eastern Meadowlark | Icteridae | -83% |
| Horned Lark | Alaudidae | -71% |
| Dickcissel | Cardinalidae | -24% |
| Lark Sparrow | Passerellidae | +184% |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.