They make wide use of the silk that they spin. Only a few have adapted to freshwater life by trapping air bubbles underwater and carrying the bubbles with them.
Spiders are numerous and live worldwide.
Although most are less than 1 cm long, the largest has a body length of about 9 cm, and its spider leg spans can be much greater. Although spiders aren't actually insects, I decided to include them because they are pretty similar to insects.