Typical late summer insects present now include fall webworm, annual cicada, and katydids. Cicadas and katydids are heard more than seen. The annual or dog-day cicada makes considerable noise while sitting up in shade trees during the heat of the day. This is not the same insect as the periodical cicada, which is also called either the 13 or 17-year locust. Annual cicadas rarely cause noticeable damage to trees, so control is rarely suggested.
Katydids also make noise while sitting in trees, but at night.
Katydids are green, about 2 to 3 inches long, and have both long antennae and legs. These insects do not cause any significant damage to trees. Depending on your point of view, their singing may be annoying or just a soothing sound of the summer night. Of the three, fall webworms are the most visible. Silk tents have been showing up in a variety of shade trees.