When do northern rough-winged swallows arrive in Pennsylvania?
The Northern Rough-winged Swallow is a summer breeder in Pennsylvania — here is when to expect it, when it leaves, and how to be ready.
Northern Rough-winged Swallow timing in Pennsylvania
- Arrives
- Around March
- Leaves
- By August
- Status here
- Summer breeder
- Nesting season
- April–July
- Present roughly
- March–August
In Pennsylvania, northern rough-winged swallows are present through the warm months, arriving around March and heading south again by August.
These windows are set by latitude: Pennsylvania sits in the middle part of this species' range, so timing here tracks the continental average closely. 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 northern rough-winged swallows are expected in Pennsylvania. 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 March is the time to act. Have feeders cleaned, filled and out by early March — the first northern rough-winged swallows into Pennsylvania are scouting for reliable food, and a station that's ready early gets added to their route.
Once nesting begins around April, adults switch to protein-rich food for their young and visits to feeders become quick and purposeful. Expect the busiest activity at dawn.
What northern rough-winged swallows eat while they're here
- Flies, midges, beetles and winged ants
Nests in drainpipes, culverts and bank holes rather than colonies; often the first swallow over a pond.
Full Northern Rough-winged Swallow diet guide → · Best feeder for northern rough-winged swallows →
Native plants that hold northern rough-winged swallows in Pennsylvania
Food keeps a migrant for a day; habitat keeps it for the season. These Pennsylvania-native plants are known to attract northern rough-winged swallows:
Summer fruit and a major caterpillar host.
Acorns and insects.
Fall seed.
Fat-rich red fall fruit taken by thrushes, bluebirds and woodpeckers.
Early-summer berries arrive exactly when nestlings are being fed.
Drought-hardy prairie oak with large acorns and a heavy insect load.
Late-summer berry clusters taken by over 40 bird species.
Blue-black fall fruit and dense nesting cover.
Keep exploring
Frequently asked
When do northern rough-winged swallows arrive in Pennsylvania?
northern rough-winged swallows typically arrive in Pennsylvania around March, with nesting underway by April. Timing can shift a week or two with the weather in any given year.
When do northern rough-winged swallows leave Pennsylvania?
Most northern rough-winged swallows have left Pennsylvania by August. They spend the winter farther south and return the following spring.
Do northern rough-winged swallows stay in Pennsylvania all year?
No — in Pennsylvania the Northern Rough-winged Swallow is a summer breeder, present roughly March–August. Outside that window it is rarely seen in the state.
What should I put out before northern rough-winged swallows arrive in Pennsylvania?
Have feeders up and clean by early March — first arrivals scout reliable food sources. Good offerings for this species: flies, midges, beetles and winged ants.
Sources
- Northern Rough-winged Swallow — All About Birds, Cornell Lab of Ornithology
- Northern Rough-winged Swallow life history — Cornell Lab of Ornithology
- Northern Rough-winged Swallow — Audubon Guide to North American Birds
- eBird region overview and bar charts — Pennsylvania
- 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.