There are around 3,200 species of treehopper or thorn bug. These insects have a pointy horn on their backs that looks like a thorn. The thorn probably helps them hide from birds and other predators. Treehoppers feed on sap by cutting plants with their sharp beaks.
- "Umbonia crassicornis." F.W. Mead (retired), Florida Department of Agriculture and Consumer Services, Division of Plant Industry; and Thomas R. Fasulo, University of Florida. University of Florida Institute of Food and Agriculture Sciences. http://entomology.ifas.ufl.edu/creatures/orn/thorn_bug.htm
- “Membracidae.” Encyclopedia of Life, available from: http://www.eol.org/pages/605/entries/29044003/details
- “Membracidae” Wikipedia, the Free Encyclopedia.
- “Umbonia crassicorni.” Wikipedia, the Free Encyclopedia. Available from: http://en.wikipedia.org/wiki/Umbonia_crassicornis
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