Manitoba · Year-round resident

Brown-headed Cowbirds in Manitoba

When cowbirds are present in Manitoba, when they nest, which native Manitoba plants feed them, and how to host them in a Canada 1a–3b yard.

Blackbirds (Icteridae)Brown-headed CowbirdMolothrus ater

Status in Manitoba: Year-round resident
Nesting window: May–July
Broods: —
Hardiness zones: Canada 1a–3b

When to expect cowbirds in Manitoba

Brown-headed Cowbirds live in Manitoba all year. Very cold winters to −30°F. That makes the cold months the time your yard matters most to them.

Continental, from prairie in the southwest to boreal forest and Hudson Bay tundra in the north.

Nesting in Manitoba

Across Manitoba, cowbirds typically nest from May–July. Plan around that window: April for setup, July for clean-out.

Warm summers with a short, intense nesting season.

Brown-headed Cowbirds don't use nest boxes. Keep dense native shrubs and trees such as paper birch for nest sites.
Delay heavy pruning of shrubs until after July.

Native Manitoba plants that attract cowbirds

Of the regional native plants we track for Manitoba, these 8 provide food or cover cowbirds use:

Wild bergamot

Monarda fistulosa · Perennial

Tubular flowers for hummingbirds and seed heads for finches.

Black-eyed Susan

Rudbeckia hirta · Perennial

Prolific seed heads for finches and sparrows.

Common sunflower

Helianthus annuus · Perennial

Annual native sunflower — the original feeder seed.

New England aster

Symphyotrichum novae-angliae · Perennial

Late nectar for insects and fall seed for sparrows.

Little bluestem

Schizachyrium scoparium · Perennial

Native bunchgrass; winter seed and ground cover for sparrows and juncos.

Tall goldenrod

Solidago altissima · Perennial

Insect-rich in fall and seed in winter.

Paper birch

Betula papyrifera · Tree

Catkin seed feeds redpolls and siskins all winter.

Rocky Mountain bee plant

Cleome serrulata · Perennial

Nectar-rich in summer, seed for finches in fall.

Feeding cowbirds through the Manitoba year

Top foods: Millet, Cracked corn.
In Manitoba's winter: Very cold winters to −30°F.

Full diet breakdown for cowbirds · Best feeder for cowbirds

Frequently asked

Are cowbirds in Manitoba year-round?

Yes. Brown-headed Cowbirds are year-round residents in Manitoba.

When do cowbirds nest in Manitoba?

Nesting in Manitoba typically runs May–July, with —. Clutches are up to 36 eggs per season, one per host nest, incubated for 10–12 days.

What native plants attract cowbirds in Manitoba?

Wild bergamot, Black-eyed Susan, Common sunflower, New England aster, Little bluestem, Tall goldenrod, Paper birch, Rocky Mountain bee plant are native plants in Manitoba that provide food or cover for cowbirds.

Other backyard birds in Manitoba

Eastern Bluebird Black-capped Chickadee Purple Martin Downy Woodpecker Hairy Woodpecker American Goldfinch White-breasted Nuthatch House Wren Purple Finch Ruby-throated Hummingbird Mourning Dove American Robin Dark-eyed Junco White-throated Sparrow Song Sparrow Chipping Sparrow Northern Flicker Pileated Woodpecker Yellow-bellied Sapsucker Red-breasted Nuthatch Common Grackle Red-winged Blackbird Baltimore Oriole Rose-breasted Grosbeak Evening Grosbeak Pine Siskin Common Redpoll Gray Catbird Brown Thrasher Cedar Waxwing Tree Swallow Barn Swallow Eastern Phoebe Chimney Swift Yellow-rumped Warbler Great Crested Flycatcher Eastern Kingbird American Tree Sparrow House Sparrow European Starling Black-billed Magpie Canada Jay Mountain Bluebird White-crowned Sparrow Fox Sparrow Eurasian Collared-Dove American Crow Common Raven Cooper's Hawk Sharp-shinned Hawk Red-tailed Hawk Barred Owl Great Horned Owl American Kestrel Wood Duck Mallard Great Blue Heron Belted Kingfisher Scarlet Tanager Ruby-crowned Kinglet Golden-crowned Kinglet Hermit Thrush Winter Wren Pine Grosbeak Red Crossbill Gray Catbird Western Tanager Hooded Merganser Yellow Warbler Common Yellowthroat American Redstart Black-and-white Warbler Ovenbird Orange-crowned Warbler Palm Warbler Red-eyed Vireo Warbling Vireo Eastern Wood-Pewee Least Flycatcher Western Kingbird Cliff Swallow Northern Rough-winged Swallow Bank Swallow Common Nighthawk Eastern Whip-poor-will Canada Goose American Coot Killdeer Spotted Sandpiper American Woodcock Black-crowned Night Heron Turkey Vulture Osprey Bald Eagle Merlin Peregrine Falcon Northern Saw-whet Owl Burrowing Owl Black-backed Woodpecker American Three-toed Woodpecker Savannah Sparrow Swamp Sparrow Harris's Sparrow Vesper Sparrow Snow Bunting Lapland Longspur Horned Lark Common Redpoll Hoary Redpoll White-winged Crossbill Bohemian Waxwing Bobolink Yellow-headed Blackbird Brewer's Blackbird Rusty Blackbird Rock Pigeon

Sources

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.