Are There Black Crowned Night Herons in Maine?
Black Crowned Night Herons visit Maine as seasonal migrants, arriving in spring to nest in small colonies along coastal marshes and river valleys. They are uncommon but present during breeding season from May through August. Most birds depart by fall, though a few linger into September.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 21, 2026.
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- 10,684
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- birding hotspots
Yes, black crowned night herons are in Maine. Next you'll want:
Black Crowned Night Herons visit Maine as seasonal migrants, arriving in spring to nest in small colonies along coastal marshes and river valleys. They are uncommon but present during breeding season from May through August. Most birds depart by fall, though a few linger into September.
Where to find Black Crowned Night Herons in Maine
In Maine, Black Crowned Night Herons favor coastal marshes and wetlands along the Atlantic shoreline, with populations concentrated in southern regions. The Kennebec River estuary and Penobscot River valleys host small breeding colonies during summer months. Inland, they occur around larger freshwater wetlands and swamps in areas like the Sebago Lake region and scattered locations throughout the state's interior. The Rachel Carson Wildlife Refuge near Wells provides marginal habitat where they are occasionally spotted during migration. Most birds favor brackish and saltwater marsh systems over purely freshwater environments. A guide toMaine wildlifewill help you explore other species found in similar habitats. Visitors seeking comprehensive information about state wildlife can explore the fullwildlife directory. Seethe Black Crowned Night Heron guide for Mainefor more.
When Black Crowned Night Herons are active in Maine
Black Crowned Night Herons arrive in Maine in mid to late May and establish breeding colonies that remain active through July and into August. This is the peak season to encounter them, as birds are nesting and defending territories. By September, most have begun southbound migration, with stragglers departing through early October. They are strictly seasonal, with no records of overwintering birds in Maine. Migration timing can shift slightly depending on weather patterns and prey availability. Spring arrival is typically in waves as birds work northward from southeastern states. If you're interested in other migratory birds present during similar seasons, visit theMaine wildlife guidefor additional context. Seethe Maine wildlife guidefor more.
How to identify Black Crowned Night Herons
Black Crowned Night Herons are compact, stocky herons with bold plumage. Adults display striking black backs and caps with white underparts and pale gray wings. The crown feathers extend into long breeding plumes during nesting season. Eyes are large and red in breeding birds, reflecting their nocturnal nature. Juveniles are far less distinctive, appearing as brownish, streaky birds with yellowish eyes and greenish legs, often causing confusion with other herons. The call is a distinctive loud quack or qua sound, typically given at dusk and during the night. Adults measure about 24 inches long with a stocky build and relatively short legs compared to larger heron species. These features make them recognizable to experienced birders once learned.
Where Black Crowned Night Herons concentrate in Maine
Sightings of Black Crowned Night Herons concentrate in coastal salt marshes and brackish estuaries, particularly where Spartina grasses and tidal channels create ideal hunting grounds. The Kennebec and Penobscot river systems host the most reliable breeding populations. In southern Maine, salt marshes around Old Orchard Beach and the Saco River delta attract visiting birds. Inland wetlands with dense shrub cover, especially those surrounded by mixed forest, occasionally host small numbers. These birds prefer shallow water with abundant small fish and crustaceans. Rocky outcrops and dense vegetation near water provide safe roost sites away from predators. Experienced observers often locate birds by listening for their diagnostic calls at dusk near known marshes.
Behavior and diet of Black Crowned Night Herons
Black Crowned Night Herons are primarily nocturnal hunters, remaining hidden in dense vegetation during daylight hours and becoming active at dusk and throughout the night. They feed on small fish, frogs, crustaceans, and aquatic insects, hunting in shallow water with patience and quick strikes. These herons often sit motionless for extended periods, waiting for prey to pass within striking range. They are colonial nesters, building stick nests in shrubs or small trees near or over water, often alongside other herons and egrets. Pairs may raise two broods in favorable conditions. Birds communicate through various vocalizations including quacks, squawks, and yelps, particularly during breeding season. Their solitary hunting behavior contrasts with their social breeding habits, and small groups may share preferred feeding locations.
Coexistence and legal protections in Maine
Black Crowned Night Herons are protected under the federal Migratory Bird Treaty Act, making it illegal to harm, capture, or significantly disturb nesting colonies. Maine state law provides additional protections for these birds and their wetland habitats. Nesting colonies warrant special consideration, as human disturbance during breeding season can cause nest abandonment and breeding failure. Viewing birds from a distance using binoculars minimizes stress on wild populations. Their diet consists entirely of wild fish and small aquatic animals, so they do not compete with human fisheries or threaten human interests. Wetland preservation benefits this species and many others. As nocturnal birds, they pose no safety risk to humans, though their presence may be announced by their loud calls during breeding season.
Species commonly confused with Black Crowned Night Herons
Black Crowned Night Herons are most often confused with juvenile or immature Great Blue Herons, which are much larger and more heavily streaked. Least Bitterns, another secretive wading bird, are smaller and show different plumage patterns with buff and brown tones. Green Herons are smaller, all-green above, and lack the distinctive black and white pattern of adults. Immature Black Crowned Night Herons, which are brown and streaky, cause confusion with American Bitterns, though bitterns are rarer and prefer dense cattail marshes. Yellow-crowned Night Herons, a close relative, are larger and show ochre and white on the head. Experienced birders use size, proportions, plumage patterns, and calls to distinguish these species reliably. Field guides specific to North American herons provide detailed comparison illustrations.
Frequently asked questions about Black Crowned Night Herons in Maine
Q: Are Black Crowned Night Herons active during the day? A: These herons are strictly nocturnal and remain hidden in dense vegetation during daylight hours, emerging to hunt at dusk and throughout the night. Q: Can Black Crowned Night Herons survive Maine winters? A: No, these birds are summer visitors only and migrate south before cold weather arrives, typically departing by September or early October. Q: What is that loud quack I hear near marsh areas at night? A: The distinctive quack or qua call is the Black Crowned Night Heron's primary vocalization, often heard during breeding season from roosting or nesting birds. Q: Where can I see Black Crowned Night Herons in Maine? A: Visit coastal marshes and river estuaries during May through August, particularly around the Kennebec and Penobscot river systems where breeding colonies occur annually.
Plan your black crowned night heron sighting in Maine
10,684 verified black crowned night heron records have been logged in Maine, most recently in 2026. See the GBIF records.
Where to look in Maine
- Acadia National Park · Wildlife Watching, Birdwatching · Find hotels
- Appalachian National Scenic Trail · Wildlife Watching, Birdwatching · Find hotels
- Katahdin Woods and Waters National Monument · Wildlife Watching, Birdwatching · Find hotels
- Saint Croix Island International Historic Site · Wildlife Watching · Find hotels
- Frances Perkins National Monument · Find hotels
- Maine Acadian Culture · Find hotels
- Monhegan Island · 324 species recorded
- Biddeford Pool · 321 species recorded
- Acadia NP (please use more specific location if possible) · 294 species recorded
- Biddeford Pool--East Point Sanctuary · 289 species recorded
- Wells Reserve at Laudholm · 284 species recorded
- Stratton Island · 281 species recorded
Birding hotspots via eBird (Cornell Lab).
Recent black crowned night heron sightings
- Biddeford Pool--Great Pond · 2026-07-20 18:02 · 2 seen
- Stratton Island · 2026-07-20 07:00 · 1 seen
- Fort Foster Park, Kittery · 2026-07-18 16:40 · 1 seen
- Appledore Island, Kittery US-ME 42.98715, -70.61847 · 2026-07-17 20:15 · 1 seen
- Willard Beach · 2026-07-17 06:15 · 1 seen
More wildlife in Maine