Based on 9,645 research-grade iNaturalist observations in Massachusetts, Great Blue Heron is most often recorded in May; in Massachusetts it behaves like a seasonal. It ranks #8 among birds recorded in the state in our data.
Ardea herodias
Great Blue Heron in Massachusetts 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 Massachusetts in May
American Robin
Gray Catbird
Canada Goose
Baltimore Oriole
Red-winged Blackbird
Mallard
Wild Turkey
Northern Cardinal
Places to look in Massachusetts
Botanical GardenArnold Arboretum
Botanical GardenBoston Public Garden
Botanical GardenBerkshire Botanical Garden
State ParkHalibut Point State Park
State ParkHammond Pond Reservation
State ParkTolland State Forest
FAQ
When does Great Blue Heron appear in Massachusetts?
Mainly March–November, with the most records in May.
How common is Great Blue Heron in Massachusetts?
It ranks #8 by number of iNaturalist observations among birds in Massachusetts (9,645 records in our sample).