Based on 2,480 research-grade iNaturalist observations in New York, Mourning Cloak is most often recorded in April; in New York it behaves like a summer visitor / breeder. It ranks #14 among butterflies recorded in the state in our data.
Nymphalis antiopa
Mourning Cloak in New York 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 New York in April

American Lady

Small White

Red Admiral

Eastern Comma

Spring Azure

Juvenal's Duskywing

Painted Lady
Eastern Pine Elfin
Places to look in New York
New York Botanical Garden
Botanical GardenBrooklyn Botanic Garden
Adirondack Park
Queens Botanical Garden
Franklin D. Roosevelt Four Freedoms Park
Planting Fields Arboretum State Historic Park
FAQ
When does Mourning Cloak appear in New York?
Mainly March–July, with the most records in April.
How common is Mourning Cloak in New York?
It ranks #14 by number of iNaturalist observations among butterflies in New York (2,480 records in our sample).