Prothonotary Warblers in Minnesota
When prothonotary warblers are present in Minnesota, when they nest, which native Minnesota plants feed them, and how to host them in a USDA 3a–5b yard.
- Status in Minnesota
- Summer breeder
- Nesting window
- May–June
- Broods
- 1–2 per season
- Hardiness zones
- USDA 3a–5b
- Nest box
- 1 1/8 in hole, 4 × 4 in floor, 3–6 ft over water
When to expect prothonotary warblers in Minnesota
Prothonotary Warblers are summer residents in Minnesota, arriving shortly before nesting begins in May and leaving after the young are independent.
Continental, with very cold winters and warm summers; prairie in the west, boreal forest in the northeast.
Nesting in Minnesota
Across Minnesota, prothonotary warblers typically nest from May–June. Plan around that window: April for setup, June for clean-out.
A short, intense breeding season; most nesting runs May through July.
- Have boxes cleaned and mounted before April — prothonotary warblers begin prospecting ahead of egg-laying.
- Use a 1 1/8 in entrance on a 4 × 4 in floor, mounted 3–6 ft over water.
- Fit a pole baffle or hole guard; ventilation gaps and drainage holes are essential.
- Clean out old nests after each brood and again after June.
Native Minnesota plants that attract prothonotary warblers
Of the regional native plants we track for Minnesota, these 8 provide food or cover prothonotary warblers use:
Acorns and bark insects.
Early-summer berries arrive exactly when nestlings are being fed.
Acorns plus hundreds of caterpillar species for nestling food.
Summer fruit and one of the top caterpillar host trees.
Late-summer berry clusters taken by over 40 bird species.
Lipid-rich red fruit fuels fall migrants.
Late nectar for insects and fall seed for sparrows.
Insect-rich in fall and seed in winter.
Feeding prothonotary warblers through the Minnesota year
- Top foods: None — a swamp nest box is the draw.
- In Minnesota's summer: offer water and insect foods; natural food is abundant.
Full diet breakdown for prothonotary warblers · Best feeder for prothonotary warblers
Frequently asked
Are prothonotary warblers in Minnesota year-round?
No. Prothonotary Warblers are summer breeders in Minnesota and leave for the winter.
When do prothonotary warblers nest in Minnesota?
Nesting in Minnesota typically runs May–June, with 1–2 per season. Clutches are 3–7 eggs, incubated for 12–14 days.
What native plants attract prothonotary warblers in Minnesota?
Bur oak, Serviceberry, White oak, Black cherry, American elderberry, Spicebush, New England aster, Tall goldenrod are native plants in Minnesota that provide food or cover for prothonotary warblers.
What size birdhouse hole do prothonotary warblers need?
1 1/8 in, with a floor of 4 × 4 in mounted 3–6 ft over water.
Prothonotary Warblers in other regions
Other backyard birds in Minnesota
Sources
- Prothonotary Warbler — All About Birds, Cornell Lab of Ornithology
- Prothonotary Warbler life history — Cornell Lab of Ornithology
- Prothonotary Warbler — Audubon Guide to North American Birds
- NestWatch nest box plans and species requirements — Cornell Lab
- eBird region overview and bar charts — Minnesota
- USDA Plant Hardiness Zone Map (2023)
- Audubon Native Plants Database
Timing reflects typical patterns for the region as a whole; local dates vary with elevation and year. Check the linked eBird bar charts for your county.