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Signs of the Seasons: A New England Phenology Program


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The Story of Milkweed

Maine’s hearty pod-bearing milkweed is an essential part of seasonal change. The stalky perennial provides annual food and shelter to butterflies in all stages of metamorphosis. The insects depend on the safe haven provided by Maine’s three types of milkweed plants: the sun-loving butterfly and common types and the purple-flowered swamp variety. Maine gardeners also plant non-native species as ornamentals or to attract butterflies. Found primarily in North America, the plant provides butterflies and caterpillars shelter, food and defense against predators. Monarchs, for example, lay their eggs almost exclusively on milkweed. After hatching, monarch larvae feed on the leaves, ingesting the plant’s toxins. This brilliant trick of nature makes both caterpillars and butterflies unpalatable to predators such as birds and small rodents. Read more

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Image Description: Rogan milkweed plate


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USA National Phenology Network: Taking the Pulse of Our Planet

University of Maine Cooperative Extension

Maine Sea Grant


Contact Information

Signs of the Seasons: A New England Phenology Program
377 Manktown Road
Waldoboro, Maine 04572
Phone: 207.832.0343 or 1.800.244.2104 (in Maine)E-mail: extension@maine.edu
The University of Maine
Orono, Maine 04469
207.581.1110
A Member of the University of Maine System