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Friends of Kananaskis Country

Enhance, protect and share the unique natural and cultural experiences of Kananaskis Country through public participation and environmental education.

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  • About K-Country
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    • Trail Maps
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    • Bite-Sized Advice
    • Trail & Camping Info
    • Kananaskis Conservation Pass
    • Critters of K-Country
    • Flowers of K-Country
    • Plants of K-Country
    • Fungi of K-Country
  • Programs + Events
    • Trail Care
      • Recruiting Crew Leaders & Backcountry Crew
      • Migratory Birds and the Friends
    • Canmore Trail Alliance
    • Trails Fest
    • Environmental Education
    • Chandra Crawford Hut at CNC
  • Engage
    • Sign Up and Join Us
    • Volunteer
      • Volunteer Projects
    • Corporate & Group Trail Days
    • Trail Day – What to Bring & Expect
    • Volunteer Agreement, Release and Waiver of Liability Form
    • Trail Groups and Clubs
  • Library
    • Latest News
    • Annual Reports
    • Great Kananaskis Flood Book
    • Bylaws & Cooperating Agreement
    • Newsletter
      • 2020 Newsletter Archive
      • 2019 Newsletter Archive
      • 2018 Newsletter Archive
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Milbert’s Tortoiseshell

Milbert’s Tortiseshell Butterfly

Milbert’s Tortoiseshell Butterflies can be found almost anywhere in Kananaskis. Their distinctive colour scheme makes them easy to identify. That brilliant yellow and orange band along the wing edge stands out against the dark brown of their wings and body.

Milbert’s are unique to North America, ranging from Alaska down almost to the Gulf Coast. There are actually 5 subspecies, too. For folks who like to photograph butterflies, it has the kind habit of opening its wings almost flat when it’s at rest.

Though it is not a plant you want to find normally, if you see Stinging Nettle, you’ll almost always find Milbert’s larvae/caterpillars on it in May through July. Adults feed on most flowers, but particularly like White Thistle and non-native Canada Thistle. They also can be found on Aspens and Poplars eating sap. For some reason, you often find them on the ground in rocks and dirt. They can also have 2 broods a year. If those nettles are still around in August, expect to see adults emerging in September.

Like Mourning Cloak and Titania’s Flitterary butterflies, Milbert’s hibernate as adults. However, they are not typically as early-emergent as the other two.

Meet more butterflies of K-Country here!

Digging in the dirt

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Contact Us

email: info@kananaskis.org
Phone: 403.678.5593
Mail Address:
Suite 201, 800 Railway Ave.
Canmore, Alberta
T1W 1P1

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