Based on 3,648 research-grade iNaturalist observations in Pennsylvania, Tree Swallow is most often recorded in May; in Pennsylvania it behaves like a seasonal. It ranks #33 among birds recorded in the state in our data.
Tachycineta bicolor
Tree Swallow in Pennsylvania by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also seen in Pennsylvania in May
American Robin
Gray Catbird
Red-winged Blackbird
Northern Cardinal
Canada Goose
Baltimore Oriole
House Sparrow
Blue Jay
Places to look in Pennsylvania
National ForestAllegheny National Forest
State ParkPresque Isle State Park
Botanical GardenJenkins Arboretum
State ParkCherry Springs State Park
State ParkColton Point State Park
State ParkLeonard Harrison State Park
FAQ
When does Tree Swallow appear in Pennsylvania?
Mainly April–June, with the most records in May.
How common is Tree Swallow in Pennsylvania?
It ranks #33 by number of iNaturalist observations among birds in Pennsylvania (3,648 records in our sample).