Migration & timing
Common Merganser in Pennsylvania
There aren't yet enough observations of Common Merganser in Pennsylvania to describe its timing with confidence.
Sighting 7 observations in Pennsylvania
Check back as more observations come in, or explore Common Merganser across North America.
Common Merganser elsewhere
More birds in Pennsylvania
Data: iNaturalist research-grade observations (CC0 / CC-BY), via GBIF. Excludes eBird.