Thorn Bug
thorn bugs mimicking thorny twigs
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What it is: Umbonia crassicornis
Where it's from: South and Central America, Mexico
What to know: A common pest in southern Florida, the thorn bug has adapted to look strikingly similar to, well, thorns. The insects cling to stems and tree trunks in large clusters, per the University of Florida, making them tough for even humans to spot at first.