Grasshoppers are indiscriminate. They will eat most anything. Some years it seems like they are everywhere. Other years, they aren’t so bad. The differential grasshopper and the two-striped grasshoppers are the most common seen in the vegetable garden. Control is best achieved when the insects are young and generally group together to feed. Here is information on their control from K-State Research and Extension if you feel control is needed.
Flea beetles are an annoyance on many host plants. They especially love eggplant, melon and beans. They are very small, jumping beetles---thus their name. They can vary in shape and color. Flea beetles are generally worse earlier in the growing season. If infestation is high enough, plant health will be stunted and can wilt. Here are a couple of good articles from K-State Research and Extension and University of Minnesota Extension about flea beetles.