I found this quarter sized bug crawling on my plant. It didn’t seem to be harmful but I have some leaves that are dying. Just wondering if this little guy could be the reason. He flew away before I could catch him but I did get a good picture first! (Chicago)
Your insect is the green stink bug.
These bugs are common and found thru out North America in woodlands, meadows, woodland edges, gardens and cultivated fields.
Both adults and nymphs feed by sucking juices from leaves, fruits and flowers of a wide variety of plants. They can be a pest of cotton, fruit trees, soybeans, and many vegetables.
The adult lays ‘keg-shaped’ eggs that hatch into nymphs (there are 5 stages of nymphs) before they turn into the adult stage. The nymphs are not all green but are mostly black around the head and thorax with striped abdomens.
The green stink bugs are not known to bite, but with piercing-sucking mouthparts they might if squeezed or mishandled.