Phyllidae is a scientific name for a family of insects commonly known as leaf insects. There are various synonyms that are used to refer to this family. One of the most common synonyms is Phylliidae, which is sometimes spelled with an "i" instead of a "y". Other synonyms include the name "walking leaf" due to their ability to mimic the appearance of leaves as a form of camouflage, and "ghost insects" because of their pale coloration. Additionally, they are sometimes referred to simply as "leaf bugs." Overall, these synonyms offer different ways to describe and identify this unique family of insects.