Species Insects & ArthropodsNorthern Metalmark

Northern Metalmark

Calephelis borealis

RareInsect & Arthropod
Illustration of Northern Metalmark (Calephelis borealis)

The Northern Metalmark is one of the rarest and most localized butterflies in eastern North America, now restricted to scattered colonies on shale outcrops in the mid-Atlantic region where its host plant, round-leaved ragwort, grows. Its wings are chestnut-brown with two metallic silver-gray bands and rusty spots. It is a small, alert butterfly that perches with wings spread flat.

Habitat
Shale barrens and dry limestone outcrops with ragwort
Diet
Larvae: round-leaved ragwort. Adults: nectar from composite flowers
How common
Rare

Best time to see a Northern Metalmark

The best time to see a Northern Metalmark is June–July, when about 94% of U.S. sightings happen, based on 580 research-grade iNaturalist observations.

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Not certain it is a Northern Metalmark? What bug is this? walks through what to check first and the lookalikes that catch people out.

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