Based on 2,119 research-grade iNaturalist observations in Maine, Black Guillemot is most often recorded in July; in Maine it behaves like a summer visitor / breeder. It ranks #9 among birds recorded in the state in our data.
Cepphus grylle
Black Guillemot in Maine 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 Maine in July
American Herring Gull
Common Eider
Common Tern
Double-crested Cormorant
Common Loon
Bald Eagle
Song Sparrow
Mallard
Places to look in Maine
State ParkBaxter State Park
State ParkFort Halifax
State ParkTwo Lights State Park
State ParkQuoddy Head State Park
State ParkFort Point State Park
State ParkPopham Beach State Park
FAQ
When does Black Guillemot appear in Maine?
Mainly May–August, with the most records in July.
How common is Black Guillemot in Maine?
It ranks #9 by number of iNaturalist observations among birds in Maine (2,119 records in our sample).