Bicknell's Thrush
Bicknell's Thrush has fallen sharply: down 68% on the route-weighted index since 1968.
About the Bicknell's Thrush
The Bicknell's Thrush (Catharus bicknelli) is a North American member of the Thrushes (Turdidae). In this analysis it is grouped with the forest birds.
- Size
- 6–11 in long (15–28 cm) — a medium songbird (typical for the family)
- Habitat
- Woodlands and forest edges, including wooded suburbs and parks.
- Diet
- Insects and spiders gleaned from foliage and bark, with seeds and berries in season.
- Range
- Recorded on 7 Breeding Bird Survey routes across 2 states, most concentrated in the Atlantic Northern Forest.
- Family
- Turdidae · Forest birds
Notable Bicknell's Thrush Trends
No notable trend signals for Bicknell's Thrush. See the full index history below.
Bicknell's Thrush Population Forecast
If the recent trend holds, Bicknell's Thrush is projected to stay roughly flat through 2001, near 0.00 (95% range 0.00–0.00). A 5-year backtest shows a typical error of ±172.2%, with 100% of held-out values landing inside the 95% band.
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 1997 | 0.00 | 0.00 | 0.00 |
| 1998 | 0.00 | 0.00 | 0.00 |
| 1999 | 0.00 | 0.00 | 0.00 |
| 2000 | 0.00 | 0.00 | 0.00 |
| 2001 | 0.00 | 0.00 | 0.00 |
Where the Bicknell's Thrush Is Detected
BBS routes recording Bicknell's Thrush, sized by most recent count.
Bicknell's Thrush Population Trend by State
| Maine | insufficient data | n/a | 3 |
| New Hampshire | +1% | 1969 | 4 |
Bicknell's Thrush Population Trend by Region
Bird Conservation Regions are the ecological unit for trends.
| Atlantic Northern Forest | -52% | 1968 | 7 |
Bicknell's Thrush Conservation Status
Our route-weighted index shows it down about 68% since 1968.
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. Trend is a route-weighted relative-abundance index, not an absolute population.