Purple Martins in North Dakota
When purple martins are present in North Dakota, when they nest, which native North Dakota plants feed them, and how to host them in a USDA 3a–4b yard.
- Status in North Dakota
- Summer breeder
- Nesting window
- June–July
- Broods
- 1 per season
- Hardiness zones
- USDA 3a–4b
- Nest box
- 1 3/4–2 1/8 in round, or starling-resistant crescent (3 × 1 3/16 in) hole, 6 × 6 in minimum (6 × 12 in preferred) floor, 10–20 ft on a telescoping pole, 40+ ft from trees
- Range note
- Eastern half.
When to expect purple martins in North Dakota
Purple Martins are summer residents in North Dakota, arriving shortly before nesting begins in June and leaving after the young are independent. Eastern half. Through the season they feed on dragonflies, flies, beetles and moths; flying ants and wasps.
Continental northern prairie with prairie-pothole wetlands and the Missouri River breaks.
Nesting in North Dakota
Across North Dakota, purple martins typically nest from June–July. Nest site: in the East, nests almost entirely in human-supplied martin houses and gourds. Females lay 3–6 eggs, incubate for 15–18 days, and young leave the nest after 26–32 days.
Short, warm summers with a peak nesting season in June.
- Have boxes cleaned and mounted before May — purple martins begin prospecting ahead of egg-laying.
- Use a 1 3/4–2 1/8 in round, or starling-resistant crescent (3 × 1 3/16 in) entrance on a 6 × 6 in minimum (6 × 12 in preferred) floor, mounted 10–20 ft on a telescoping pole, 40+ ft from trees.
- Fit a pole baffle or hole guard; ventilation gaps and drainage holes are essential.
- Clean out old nests after each brood and again after July.
Native North Dakota plants that attract purple martins
Of the regional native plants we track for North Dakota, these 8 provide food or cover purple martins use:
Drought-hardy prairie oak with large acorns and a heavy insect load.
Summer fruit and one of the top caterpillar host trees.
Late-summer berry clusters taken by over 40 bird species.
Late nectar for insects and fall seed for sparrows.
Insect-rich in fall and seed in winter.
Catkin seed feeds redpolls and siskins all winter.
Hosts hundreds of caterpillar species; spring flowers draw early insects.
Dark summer fruit and heavy caterpillar load.
Feeding purple martins through the North Dakota year
Purple Martins do not use feeders. Supporting them means supplying correctly built colony housing in the open and managing House Sparrows and starlings.
- Best foods: Crushed eggshells (calcium) offered on a tray near housing.
- Avoid: Seed and suet feeders — martins will not use them.
- In North Dakota's summer: offer water and insect foods; natural food is abundant.
Frequently asked
Are purple martins in North Dakota year-round?
No. Purple Martins are summer breeders in North Dakota and leave for the winter. Eastern half.
When do purple martins nest in North Dakota?
Nesting in North Dakota typically runs June–July, with 1 per season. Clutches are 3–6 eggs, incubated for 15–18 days.
What native plants attract purple martins in North Dakota?
Bur oak, Black cherry, American elderberry, New England aster, Tall goldenrod, Paper birch, Sugar maple, Chokecherry are native plants in North Dakota that provide food or cover for purple martins.
What size birdhouse hole do purple martins need?
1 3/4–2 1/8 in round, or starling-resistant crescent (3 × 1 3/16 in), with a floor of 6 × 6 in minimum (6 × 12 in preferred) mounted 10–20 ft on a telescoping pole, 40+ ft from trees.
Purple Martins in other regions
Other backyard birds in North Dakota
Sources
- Purple Martin — All About Birds, Cornell Lab of Ornithology
- Purple Martin life history — Cornell Lab of Ornithology
- Purple Martin — Audubon Guide to North American Birds
- Purple Martin Conservation Association — housing guidelines
- eBird region overview and bar charts — North Dakota
- 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.