Last week, I visited a property that is owned by a member of the Isabella Conservation District Board of Directors. This property is enrolled in a conservation program through the
Natural Resources Conservation Service (NRCS) and is open to the public as part of the
Michigan Department of Natural Resources Hunting Access Program (HAP). I went out to this property searching for Monarch Butterfly caterpillars - we found 50 of them at this property over the course of three weeks. While I did not find many Monarchs on this day (only 3 caterpillars), the patches of flowers were instead being visited by dozens of
Milbert's Tortoiseshell Butterflies (
Aglais milberti). The caterpillars of the Milbert's Tortoiseshell feed only on nettles - there are plenty of them in this field.
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Asters, Goldenrod, and Milkweed under cumulus and cirrus clouds |
The underside of the Milbert's Tortoiseshell wings are a rich chocolate brown.
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The chocolate brown underside of a Milbert's Tortoiseshell |
When it opens its wings, it exposes broad bands of orange.
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Milbert's Tortoiseshell - opening its wings to expose orange submarginal bands |
These butterflies were mostly keeping their wings closed, but I was able to find one that wasd sunning itself with its wings spread wide. A close look shows a yellow appears at the front edge of the orange band, and border of blue spots can be found on the edge of its wings.
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Milbert's Tortoiseshell - note the yellow and orange band, and blue along the margin of the wings. |
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