Kentucky · Summer breeder

Tree Swallows in Kentucky

When tree swallows are present in Kentucky, when they nest, which native Kentucky plants feed them, and how to host them in a USDA 6a–7b yard.

Swallows (Hirundinidae)Tree SwallowTachycineta bicolor

Status in Kentucky: Summer breeder
Nesting window: May–June
Broods: 1 per season
Hardiness zones: USDA 6a–7b
Nest box: 1 1/2 in hole, 5 × 5 in floor, 5–10 ft

When to expect tree swallows in Kentucky

Tree Swallows are summer residents in Kentucky, arriving shortly before nesting begins in May and leaving after the young are independent. Through the season they feed on flies, mayflies and dragonflies.

Humid subtropical, from the Appalachian plateau in the east to the Bluegrass and the Mississippi lowlands in the west.

Nesting in Kentucky

Across Kentucky, tree swallows typically nest from May–June. Nest site: nest box or tree cavity lined with feathers. Females lay 4–7 eggs, incubate for 11–20 days, and young leave the nest after 15–25 days.

Hot, humid summers.

Have boxes cleaned and mounted before April — tree swallows begin prospecting ahead of egg-laying.
Use a 1 1/2 in entrance on a 5 × 5 in floor, mounted 5–10 ft.
Fit a pole baffle or hole guard; ventilation gaps and drainage holes are essential.
Clean out old nests after each brood and again after June.

Native Kentucky plants that attract tree swallows

Of the regional native plants we track for Kentucky, these 8 provide food or cover tree swallows use:

Flowering dogwood

Cornus florida · Tree

Fat-rich red fall fruit taken by thrushes, bluebirds and woodpeckers.

Serviceberry

Amelanchier arborea · Tree

Early-summer berries arrive exactly when nestlings are being fed.

White oak

Quercus alba · Tree

Acorns plus hundreds of caterpillar species for nestling food.

Bur oak

Quercus macrocarpa · Tree

Drought-hardy prairie oak with large acorns and a heavy insect load.

Black cherry

Prunus serotina · Tree

Summer fruit and one of the top caterpillar host trees.

American elderberry

Sambucus canadensis · Shrub

Late-summer berry clusters taken by over 40 bird species.

Arrowwood viburnum

Viburnum dentatum · Shrub

Blue-black fall fruit and dense nesting cover.

Spicebush

Lindera benzoin · Shrub

Lipid-rich red fruit fuels fall migrants.

Feeding tree swallows through the Kentucky year

Tree swallows readily take bluebird-style nest boxes; mount boxes in pairs 15–25 ft apart to share with bluebirds.

Best foods: Crushed eggshells in spring.
In Kentucky's summer: offer water and insect foods; natural food is abundant.

Full diet breakdown for tree swallows · Best feeder for tree swallows

Frequently asked

Are tree swallows in Kentucky year-round?

No. Tree Swallows are summer breeders in Kentucky and leave for the winter.

When do tree swallows nest in Kentucky?

Nesting in Kentucky typically runs May–June, with 1 per season. Clutches are 4–7 eggs, incubated for 11–20 days.

What native plants attract tree swallows in Kentucky?

Flowering dogwood, Serviceberry, White oak, Bur oak, Black cherry, American elderberry, Arrowwood viburnum, Spicebush are native plants in Kentucky that provide food or cover for tree swallows.

What size birdhouse hole do tree swallows need?

1 1/2 in, with a floor of 5 × 5 in mounted 5–10 ft.

Other backyard birds in Kentucky

Northern Cardinal Eastern Bluebird Carolina Chickadee Purple Martin Downy Woodpecker Hairy Woodpecker American Goldfinch Tufted Titmouse White-breasted Nuthatch Blue Jay House Finch Purple Finch Ruby-throated Hummingbird Carolina Wren Mourning Dove American Robin Dark-eyed Junco White-throated Sparrow Song Sparrow Chipping Sparrow Red-bellied Woodpecker Northern Flicker Pileated Woodpecker Red-headed Woodpecker Yellow-bellied Sapsucker Red-breasted Nuthatch Brown Creeper Common Grackle Red-winged Blackbird Baltimore Oriole Orchard Oriole Rose-breasted Grosbeak Pine Siskin Indigo Bunting Eastern Towhee Gray Catbird Northern Mockingbird Brown Thrasher Cedar Waxwing Barn Swallow Eastern Phoebe Chimney Swift Yellow-rumped Warbler Pine Warbler Eastern Screech-Owl Wood Thrush Great Crested Flycatcher Eastern Kingbird American Tree Sparrow House Sparrow European Starling White-crowned Sparrow Fox Sparrow Eurasian Collared-Dove

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.