If disturbed, these plant feeders emit a strong odor that wards off many attackers. Below the stink bug is a cicada. These insects are very common in the Midwest and can be heard on hot summer days.
Males call to attract females by distorting a sound-making organ.
Ants oftentimes defend a herd of aphids to gain access to this honeydew. If you disturb the aphids slightly, you may be lucky enough to see the ants react. Photos courtesy of Jim Rowan.