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Insects are invertebrates. Their bodies are clearly divided into a head, a thorax, and abdomen. They also have three pairs of jointed legs and usually two pairs of wings.
Insect
Gypsy moth
When Gypsy moths have an "outbreak," the caterpillars defoliate trees (eat all the leaves).
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Aphids on milkweed
Aphids come in a variety of colors - yellow, red, black, etc.
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Monarch butterfly on Black-Eyed Susans
Butterflies are beautiful to watch fluttering about.
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Monarch butterfly on flower
You'll want to get a closer look to enjoy their beauty and observe their activities.
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Cicada on a twig
It's a short season in the sun for this buzzing insect.
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Hine's Emerald Dragonfly on a twig
Dragonflies are a spectacular and colorful group of insects.
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Emerald Ash Borer on leaf
Once these invaders get into a tree, the tree always dies.
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Monarch catapillar eating a leaf
Without caterpillars, there wouldn't be any butterflies.
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Butterfly on Black-eyed Susans
Watching butterflies is a fun summer activity and you can invite them to your very own yard.
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Hines emerald dragonfly on a twig
Wisconsin Status: EndangeredFederal Status: Endangered
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Karner Blue Butterfly on leaf
Beauty and grace best describe this federally endangered species.
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Butterfly drinking from flower
Butterflies begin as eggs, transform into a larvae or caterpillar stage, then a pupa, and finally a winged adult.
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Milkweed beetle
There are several types of beetles that feed on milkweed.
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Monarch Butterfly on Black-eyed Susans
What's small, has orange wings with black veins and flies to Mexico for the winter?
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Monarch caterpillar on milkweed
Can you find the monarch caterpillar on the leaf?
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Multicolored Asian Lady Beetle
The multicolored Asian lady beetles look like common "ladybugs."
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Snow Flea, Photo Courtesy of Kenneth Christiansen
What, snow has fleas? Where?
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Firefly on leaf
A story about fireflies by Genny Fannucchi.
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Honey Bee on flower
Wisconsin state insect.
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Luna Moth
If you see a fluorescent green, large moth in the moonlight, it's probably a Luna moth.
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Yellow-faced Bee on flower
This ¼ inch bee is slender and looks somewhat like a wasp.
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Tussock Moths on Milkweed
These very hungry caterpillars can be abundant on milkweed.
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At a Glance

  • Gypsy moth

    When Gypsy moths have an "outbreak," the caterpillars defoliate trees (eat all the leaves).

  • Aphids on milkweed

    Aphids come in a variety of colors - yellow, red, black, etc.

  • Monarch butterfly on Black-Eyed Susans

    Butterflies are beautiful to watch fluttering about.

  • Monarch butterfly on flower

    You'll want to get a closer look to enjoy their beauty and observe their activities.

  • Cicada on a twig

    It's a short season in the sun for this buzzing insect.