Phalangida, also known as harvestmen, daddy longlegs or opiliones, are arachnids that are commonly found across the world. These creatures are characterized by their long, thin legs and rounded bodies. While the term Phalangida is commonly used to refer to this group of arachnids, there are several synonyms that are also used to describe them, including "daddy longlegs" and "opiliones." In addition, some regions may refer to them as "shepherd spiders," "harvest spiders," or "granddaddy longlegs." Regardless of the name used, these fascinating creatures play an important role in their ecosystem and are a frequent sight in gardens and woodland areas.