When do barn swallows arrive in Wyoming?
The Barn Swallow is a summer breeder in Wyoming — here is when to expect it, when it leaves, and how to be ready.
Barn Swallow timing in Wyoming
- Arrives
- Around May
- Leaves
- By August
- Status here
- Summer breeder
- Nesting season
- June–July
- Present roughly
- May–August
In Wyoming, barn swallows are present through the warm months, arriving around May and heading south again by August.
These windows are set by latitude: Wyoming sits in the middle part of this species' range, so timing here runs later than the continental average — the season starts later this far north and the birds wait for it. In any given year, weather can move the first arrivals by a week or two either way.
Month by month in this state
Highlighted months are when barn swallows are expected in Wyoming. The edges of the window are the interesting weeks — first arrivals and last departures vary most from year to year.
Getting ready before they arrive
The week before May is the time to act. This species doesn't use feeders much, but water and cover matter — a clean birdbath and undisturbed shrubs make a yard far more attractive to a newly arrived bird.
Once nesting begins around June, adults switch to protein-rich food for their young and visits to feeders become quick and purposeful. Expect the busiest activity at dawn.
What barn swallows eat while they're here
- Flies, beetles and moths
Barn swallows nest on ledges under eaves and in barns; an open-front ledge shelf gives them a site.
Native plants that hold barn swallows in Wyoming
Food keeps a migrant for a day; habitat keeps it for the season. These Wyoming-native plants are known to attract barn swallows:
Drought-hardy prairie oak with large acorns and a heavy insect load.
Late nectar for insects and fall seed for sparrows.
Insect-rich in fall and seed in winter.
Dark summer fruit and heavy caterpillar load.
Sweet dry fruit on the branch all winter.
Seeds and bark insects; pygmy nuthatch and woodpecker habitat.
Acorns for jays and woodpeckers across the southern Rockies.
Late-season bloom supports insects; seed for sparrows.
Keep exploring
Frequently asked
When do barn swallows arrive in Wyoming?
barn swallows typically arrive in Wyoming around May, with nesting underway by June. Timing can shift a week or two with the weather in any given year.
When do barn swallows leave Wyoming?
Most barn swallows have left Wyoming by August. They spend the winter farther south and return the following spring.
Do barn swallows stay in Wyoming all year?
No — in Wyoming the Barn Swallow is a summer breeder, present roughly May–August. Outside that window it is rarely seen in the state.
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 — Wyoming
- 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.