Barn Swallows in Connecticut
When barn swallows are present in Connecticut, when they nest, which native Connecticut plants feed them, and how to host them in a USDA 5b–7b yard.
- Status in Connecticut
- Summer breeder
- Nesting window
- May–July
- Broods
- 1–2 per season
- Hardiness zones
- USDA 5b–7b
When to expect barn swallows in Connecticut
Barn Swallows are summer residents in Connecticut, arriving shortly before nesting begins in May and leaving after the young are independent. Through the season they feed on flies, beetles and moths.
Humid continental with maritime moderation along Long Island Sound.
Nesting in Connecticut
Across Connecticut, barn swallows typically nest from May–July. Nest site: mud cup on beams and ledges under shelter. Females lay 3–7 eggs, incubate for 12–17 days, and young leave the nest after 15–27 days.
Warm, humid summers; peak nesting runs May through July.
- Barn Swallows don't use nest boxes. Keep dense native shrubs and trees such as flowering dogwood, serviceberry, white oak for nest sites.
- Delay heavy pruning of shrubs until after July.
Native Connecticut plants that attract barn swallows
Of the regional native plants we track for Connecticut, these 8 provide food or cover barn swallows use:
Fat-rich red fall fruit taken by thrushes, bluebirds and woodpeckers.
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.
Blue-black fall fruit and dense nesting cover.
Lipid-rich red fruit fuels fall migrants.
Late nectar for insects and fall seed for sparrows.
Feeding barn swallows through the Connecticut year
Barn swallows nest on ledges under eaves and in barns; an open-front ledge shelf gives them a site.
- Best foods: .
- In Connecticut's summer: offer water and insect foods; natural food is abundant.
Frequently asked
Are barn swallows in Connecticut year-round?
No. Barn Swallows are summer breeders in Connecticut and leave for the winter.
When do barn swallows nest in Connecticut?
Nesting in Connecticut typically runs May–July, with 1–2 per season. Clutches are 3–7 eggs, incubated for 12–17 days.
What native plants attract barn swallows in Connecticut?
Flowering dogwood, Serviceberry, White oak, Black cherry, American elderberry, Arrowwood viburnum, Spicebush, New England aster are native plants in Connecticut that provide food or cover for barn swallows.
Barn Swallows in other regions
Other backyard birds in Connecticut
Sources
- Barn Swallow — All About Birds, Cornell Lab of Ornithology
- Barn Swallow life history — Cornell Lab of Ornithology
- Barn Swallow — Audubon Guide to North American Birds
- eBird region overview and bar charts — Connecticut
- 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.