When do black-crowned night herons arrive in Maine?
The Black-crowned Night Heron is a summer breeder in Maine — here is when to expect it, when it leaves, and how to be ready.
Black-crowned Night Heron timing in Maine
- Arrives
- Around March
- Leaves
- By August
- Status here
- Summer breeder
- Nesting season
- April–July
- Present roughly
- March–August
In Maine, black-crowned night herons are present through the warm months, arriving around March and heading south again by August.
These windows are set by latitude: Maine sits in the northern part of this species' range, so timing here runs later than the continental average — the season starts later this far north and the birds wait for it. In any given year, weather can move the first arrivals by a week or two either way.
Month by month in this state
Highlighted months are when black-crowned night herons are expected in Maine. The edges of the window are the interesting weeks — first arrivals and last departures vary most from year to year.
Getting ready before they arrive
The week before March is the time to act. Have feeders cleaned, filled and out by early March — the first black-crowned night herons into Maine are scouting for reliable food, and a station that's ready early gets added to their route.
Once nesting begins around April, adults switch to protein-rich food for their young and visits to feeders become quick and purposeful. Expect the busiest activity at dawn.
What black-crowned night herons eat while they're here
- Fish, frogs, crayfish and insects
Roosts in dense trees by day and raids ponds at night; often overlooked in city parks.
Full Black-crowned Night Heron diet guide → · Best feeder for black-crowned night herons →
Native plants that hold black-crowned night herons in Maine
Food keeps a migrant for a day; habitat keeps it for the season. These Maine-native plants are known to attract black-crowned night herons:
Early-summer berries arrive exactly when nestlings are being fed.
Acorns plus hundreds of caterpillar species for nestling food.
Drought-hardy prairie oak with large acorns and a heavy insect load.
Summer fruit and one of the top caterpillar host trees.
Late-summer berry clusters taken by over 40 bird species.
Blue-black fall fruit and dense nesting cover.
Lipid-rich red fruit fuels fall migrants.
Late nectar for insects and fall seed for sparrows.
Keep exploring
Frequently asked
When do black-crowned night herons arrive in Maine?
black-crowned night herons typically arrive in Maine around March, with nesting underway by April. Timing can shift a week or two with the weather in any given year.
When do black-crowned night herons leave Maine?
Most black-crowned night herons have left Maine by August. They spend the winter farther south and return the following spring.
Do black-crowned night herons stay in Maine all year?
No — in Maine the Black-crowned Night Heron is a summer breeder, present roughly March–August. Outside that window it is rarely seen in the state.
What should I put out before black-crowned night herons arrive in Maine?
Have feeders up and clean by early March — first arrivals scout reliable food sources. Good offerings for this species: fish, frogs, crayfish and insects.
Sources
- Black-crowned Night Heron — All About Birds, Cornell Lab of Ornithology
- Black-crowned Night Heron life history — Cornell Lab of Ornithology
- Black-crowned Night Heron — Audubon Guide to North American Birds
- eBird region overview and bar charts — Maine
- USDA Plant Hardiness Zone Map (2023)
- Audubon Native Plants Database
Timing reflects typical patterns for the region as a whole; local dates vary with elevation and year. Check the linked eBird bar charts for your county.