Migration & timing

Tree Swallow in Pennsylvania

There aren't yet enough observations of Tree Swallow in Pennsylvania to describe its timing with confidence.

Sighting 12 observations in Pennsylvania

Check back as more observations come in, or explore Tree Swallow across North America.

Tree Swallow elsewhere

More birds in Pennsylvania

Data: iNaturalist research-grade observations (CC0 / CC-BY), via GBIF. Excludes eBird.