Purple Martins in Manitoba
When purple martins are present in Manitoba, when they nest, which native Manitoba plants feed them, and how to host them in a Canada 1a–3b yard.
- Status in Manitoba
- Summer breeder
- Nesting window
- June–July
- Broods
- 1 per season
- Hardiness zones
- Canada 1a–3b
- 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 Manitoba
Purple Martins are summer residents in Manitoba, arriving shortly before nesting begins in June and leaving after the young are independent. Through the season they feed on dragonflies, flies, beetles and moths; flying ants and wasps.
Continental, from prairie in the southwest to boreal forest and Hudson Bay tundra in the north.
Nesting in Manitoba
Across Manitoba, 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.
Warm summers with a short, intense nesting season.
- 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 Manitoba plants that attract purple martins
Of the regional native plants we track for Manitoba, these 8 provide food or cover purple martins use:
Drought-hardy prairie oak with large acorns and a heavy insect load.
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.
Seed-rich cones and year-round shelter.
Catkin seed feeds redpolls and siskins all winter.
Dark summer fruit and heavy caterpillar load.
Sweet dry fruit on the branch all winter.
Feeding purple martins through the Manitoba 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 Manitoba's summer: offer water and insect foods; natural food is abundant.
Frequently asked
Are purple martins in Manitoba year-round?
No. Purple Martins are summer breeders in Manitoba and leave for the winter.
When do purple martins nest in Manitoba?
Nesting in Manitoba 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 Manitoba?
Bur oak, American elderberry, New England aster, Tall goldenrod, Eastern white pine, Paper birch, Chokecherry, Common hackberry are native plants in Manitoba 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 Manitoba
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 — Manitoba
- Plant Hardiness Zones of Canada — Natural Resources Canada
- 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.