Purple Martins in Ohio
When purple martins are present in Ohio, when they nest, which native Ohio plants feed them, and how to host them in a USDA 5b–7a yard.
- Status in Ohio
- Summer breeder
- Nesting window
- May–July
- Broods
- 1 per season
- Hardiness zones
- USDA 5b–7a
- 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
When to expect purple martins in Ohio
Purple Martins are summer residents in Ohio, arriving shortly before nesting begins in May and leaving after the young are independent. Through the season they feed on dragonflies, flies, beetles and moths; flying ants and wasps.
Humid continental; cold winters and warm summers, with Lake Erie moderating the north coast.
Nesting in Ohio
Across Ohio, purple martins typically nest from May–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.
Warm, humid summers; western Lake Erie marshes are a major migration stopover.
- Have boxes cleaned and mounted before April — 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 Ohio plants that attract purple martins
Of the regional native plants we track for Ohio, these 8 provide food or cover purple martins use:
Early fruit.
High-fat fall berries.
Fat-rich red fall fruit taken by thrushes, bluebirds and woodpeckers.
Acorns plus hundreds of caterpillar species for nestling food.
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.
Blue-black fall fruit and dense nesting cover.
Feeding purple martins through the Ohio 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 Ohio's summer: offer water and insect foods; natural food is abundant.
Frequently asked
Are purple martins in Ohio year-round?
No. Purple Martins are summer breeders in Ohio and leave for the winter.
When do purple martins nest in Ohio?
Nesting in Ohio typically runs May–July, with 1 per season. Clutches are 3–6 eggs, incubated for 15–18 days.
What native plants attract purple martins in Ohio?
Serviceberry, Spicebush, Flowering dogwood, White oak, Bur oak, Black cherry, American elderberry, Arrowwood viburnum are native plants in Ohio 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 Ohio
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 — Ohio
- 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.