Tarsiers are small primates found in Southeast Asia that are known for their extraordinarily large eyes and ability to leap over 40 times their body length. There are several synonyms for the word tarsiers, including prosimian, ghost monkey, and mawas tutul. The term prosimian refers to all primates that are not monkeys or apes, and includes lemurs, lorises, and tarsiers. The name ghost monkey comes from their elusive nature and nocturnal habits, while mawas tutul is a name used by the indigenous people of Sulawesi, Indonesia, where tarsiers are commonly found. Regardless of the term used, these tiny primates are fascinating creatures to learn about and observe.