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| skippers love thistles. |
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| thistle stem gall |
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| thistle stem galls made by a fly (Urophora cardui) |
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| a bird has pecked the grub out of this gall |
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| Thistle Stem Gall Fly adult (Urophora cardui) |
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| Thistle Tortoise beetle nymphs and damage |
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| Thistle Tortoise beetle (Cassida rubiginosa) adult |
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| Nypmph of Thistle tortoise beetle, which makes a shield of its own feces to protect itself |
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| nymph of Thistle Tortoise Beetle showing the fecal shield (head is to the right) |
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| Keeled Treehopper (Entylia carinata) love thistle stems |
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| Nymphs of Keeled Treehopper |
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