Magnolia Warbler
Magnolia Warbler has held roughly steady: up 2% on the route-weighted index since 1968.
About the Magnolia Warbler
The Magnolia Warbler (Setophaga magnolia) is a North American member of the Wood-Warblers (Parulidae). In this analysis it is grouped with the forest birds.
- Size
- 4.5–5.5 in long (11–14 cm) — a small, active 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 463 Breeding Bird Survey routes across 16 states, most concentrated in the Atlantic Northern Forest.
- Family
- Parulidae · Forest birds
Notable Magnolia Warbler Trends
No notable trend signals for Magnolia Warbler. See the full index history below.
Magnolia Warbler Population Forecast
If the recent trend holds, Magnolia Warbler is projected to rise about 68% by 2029 — from 0.18 in 2024 to a central estimate of 0.30 (95% range 0.17–0.43). A 5-year backtest shows a typical error of ±64.7%, with 20% of held-out values landing inside the 95% band.
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.30 | 0.17 | 0.42 |
| 2026 | 0.30 | 0.17 | 0.42 |
| 2027 | 0.30 | 0.17 | 0.43 |
| 2028 | 0.30 | 0.17 | 0.43 |
| 2029 | 0.30 | 0.17 | 0.43 |
Where the Magnolia Warbler Is Detected
BBS routes recording Magnolia Warbler, sized by most recent count.
Magnolia Warbler Population Trend by State
| Connecticut | +20% | 1974 | 9 |
| Maine | -66% | 1969 | 74 |
| Maryland | +411% | 1968 | 8 |
| Massachusetts | -49% | 1970 | 17 |
| Michigan | 12× | 1974 | 52 |
| Minnesota | +343% | 1969 | 31 |
| New Hampshire | -44% | 1968 | 25 |
| New Jersey | insufficient data | n/a | 3 |
| New York | -50% | 1968 | 88 |
| North Carolina | insufficient data | n/a | 1 |
| Ohio | insufficient data | n/a | 2 |
| Pennsylvania | +628% | 1968 | 72 |
| Vermont | +150% | 1968 | 24 |
| Virginia | insufficient data | n/a | 2 |
| West Virginia | +815% | 1969 | 20 |
| Wisconsin | +400% | 1969 | 35 |
Magnolia Warbler Population Trend by Region
Bird Conservation Regions are the ecological unit for trends.
| Boreal Hardwood Transition | +603% | 1968 | 103 |
| Lower Great Lakes / St. Lawrence Plain | -44% | 1968 | 41 |
| Atlantic Northern Forest | -37% | 1968 | 150 |
| Prairie Hardwood Transition | +0% | 1980 | 15 |
| Appalachian Mountains | +590% | 1968 | 132 |
| New England / Mid-Atlantic Coast | -6% | 1969 | 22 |
Magnolia Warbler Conservation Status
Our route-weighted index shows it up about 2% 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.