Species At Risk

Bogbean Buckmoth

(Hemileuca sp. 1)


Bogbean Buckmoth
Bogbean Buckmoth occurrences map


The Bogbean Buckmoth is a medium to large-sized moth with forewings about 26 to 36 millimetres long. The body is largely black with a white collar and both white and orange markings on the thorax and abdomen. Each wing is dark with a thick white band and small dark spot either wholly or mostly within the band.

The larvae, which are mostly black with reddish-orange branched spines along the back, feed primarily on the bogbean plant.

The Bogbean Buckmoth has a one-year life cycle. These moths spend the winter as eggs and emerge as larvae the next spring, becoming adults in mid- to late September. They are active during the day, typically only in warm, sunny weather. Adults are capable of flying for several kilometres, but rarely leave the fens where they live.

Action we are taking:


In Canada, the Bogbean Buckmoth is restricted to two isolated sites in southeastern Ontario. This moth also occurs in northeastern New York State in wetlands near Lake Ontario.


The Bogbean Buckmoth is restricted to open, chalky, low shrub fens containing large amounts of bogbean, an emergent wetland flowering plant.


Bogbean Buckmoth in Ontario may be threatened by habitat loss and changes including water level fluctuations, land development, insecticide applications and long-term loss of wetland habitat from climate change. It is also threatened by the effects of invasive plants, especially the European Common Reed and Narrow-leaved Cattail, that are crowding out its preferred food, the bogbean.


The Bogbean Buckmoth and its habitat are protected under Ontario’s Endangered Species Act.

What You Can Do to Help Bogbean Buckmoth

  • The Ministry of Natural Resources tracks species at risk such as Bogbean Buckmoth. You can use a handy online form to report your sightings to the Natural Heritage Information Centre. Photographs with specific locations or mapping coordinates are always helpful. nhic.mnr.gov.on.ca
  • Report any illegal activity related to plants and wildlife to 1-877-TIPS-MNR (847-7667).
  • Private land owners have a very important role to play in species recovery. If you find Bogbean Buckmoth on your property, you may be eligible for stewardship programs that support the protection and recovery of species at risk and their habitats.
  • Volunteer with your local nature club or provincial park to participate in surveys or stewardship work focused on species at risk.
  • The European Common Reed, an invasive species, is a threat to the Bogbean Buckmoth. To learn what you can do to help reduce the threat of invasive species, visit: ontario.ca/invasivespecies; www.invadingspecies.com; www.ontarioinvasiveplants.ca; and, www.invasivespecies.gc.ca.

Did you know?

Unlike most buckmoths, which live in drier habitats, the Bogbean Buckmoth depends primarily on wetlands that support the bogbean, its preferred food source.

Did you know?

The Bogbean Buckmoth spends only a day (for females) or a few days (for males) as an adult.

Did you know?

The bogbean which this moth eats isn’t a bean at all – the “bean” part of its name refers to the smooth-edged shiny leaves, which are similar in appearance to those of young broad beans.

Did you know?

Buckmoths are popular with naturalists and entomologists, in part because they are active in the daytime, relatively large, and have striking colouration.

The Endangered Species Act

Contact your local ministry office

Often the best source of local information on species at risk is your nearest ministry office. Call with your questions or concerns.