Katydids – Katydids are a symbol of evil. It is thought that the katydid resembles the plague of locusts that the Prophet John wrote about in the book of Revelation in the bible. Because of this fact, katydids are thought to be an evil sign that warns of destruction and devastation. Dreaming about katydids is generally thought to be a portent of bad things to come. However, they can also be neutral or even positive symbols depending on what your personal view of them is. If you have no preconceptions about this particular insect, it is probably wise to think of them like scorpions or spiders.