Marsh Lady Beetle © Tom Murray

Marsh Lady Beetle © VCE

Marsh Lady Beetle © VCE

The Marsh Lady Beetle, also known as the Swamp Lady Beetle, is native to the United States and Canada. It’s found primarily in damp areas with low-growing vegetation. Its wing covers are primarily cream colored with black spots.

Status

Native

Ranked as Imperiled in Saskatchewan; Vulnerable in Manitoba and the Northwest Territories; Apparently Secure in Ontario, Alberta, and British Columbia; and Secure in Labrador, Newfoundland, New Brunswick, and Nova Scotia. The Marsh Lady Beetle has not been ranked in the United States.

Last Seen

2020

Fun Fact

The Marsh Lady Beetle’s Latin name (Anisosticta bitriangularis) means “two triangles” (“bis” – twice; “trangularis” – of or belonging to a triangle). This refers to the two areas on this species’ pronotum where three spots are clustered in a triangular shape.

Identification

The Marsh Lady Beetle is 3 to 4 mm in length. It is very elongate in form and overall light yellow to light orange in color.

Habitat

Low-growing vegetation in wetlands, marshes, bogs, and taiga. Can sometimes be found in forests, fields and meadows, presumably preferring those that are wet.

General Range

Labrador south to New Jersey, west to California, and north to the Northwest Territories and Alaska.

Food

Aphids and scale insects.

Life History

Based on iNaturalist data, the Marsh Lady Beetle seems to be encountered most frequently between June and August. Little information is available on this species.

More Information

You can find more information about Marsh Lady Beetles using the following links:

Vermont Distribution

Visit the iNaturalist Observation Map and Occurrence Records to find out where Marsh Lady Beetles have been seen in Vermont.