Species · Tennessee · BBS 2025 Release · 1966–2024
Brown Thrasher Population Trend in Tennessee
Brown Thrasher in Tennessee has edged down: down 17% on the route-weighted index since 1968.
-17%Since 1968
53Routes In State
58Years
Notable Brown Thrasher Trends in Tennessee
No notable trend signals for Brown Thrasher in Tennessee. See the full index history below.
Brown Thrasher Population Forecast in Tennessee
If the recent trend holds, Brown Thrasher in Tennessee is projected to fall about 32% by 2029 — from 5.5 in 2024 to a central estimate of 3.8 (95% range 2.6–5.0). A 5-year backtest shows a typical error of ±18.7%, with 60% of held-out values landing inside the 95% band.
-32%Change by 2029
3.8Projected 2029 index
2.6–5.095% range
±18.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 3.9 | 2.7 | 5.1 |
| 2026 | 3.8 | 2.6 | 5.0 |
| 2027 | 3.8 | 2.6 | 5.0 |
| 2028 | 3.8 | 2.6 | 5.0 |
| 2029 | 3.8 | 2.6 | 5.0 |
Brown Thrasher Survey Routes in Tennessee
| Big Sandy | 17 | 2024 | 1966 |
| Humboldt | 13 | 2024 | 1966 |
| Collinwood | 13 | 2024 | 1966 |
| Mansfield | 11 | 2024 | 1966 |
| Union Hill | 10 | 2024 | 1967 |
| Glen | 10 | 2024 | 1966 |
| Lovell | 10 | 2019 | 1966 |
| Signal Mtn | 9 | 2024 | 1979 |
| Oliver Spgs | 8 | 2022 | 1966 |
| Corryton Rd | 8 | 2019 | 1966 |
| Brownsville | 6 | 2024 | 1966 |
| Silerton | 6 | 2024 | 1966 |
| Allens Brdge | 6 | 2023 | 1966 |
| Whiteville | 5 | 2024 | 1966 |
| Petersburg | 5 | 2013 | 1966 |
| Red Bank | 5 | 1978 | 1967 |
| Climer | 5 | 2004 | 1967 |
| Indian Mound 2 | 5 | 2023 | 2004 |
| Tibbs | 4 | 2024 | 1966 |
| Sweetlips | 4 | 2023 | 1966 |
| Peytonsville | 4 | 2024 | 1966 |
| Bradyville | 4 | 2019 | 1966 |
| Tullahoma | 4 | 2015 | 1967 |
| Silver Pt | 4 | 2024 | 1966 |
| Smokey Jct | 4 | 2022 | 1966 |
Brown Thrasher Population Trend in Other States
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Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.