From Outscape Wiki
Harpy society is governed by two main principles: freedom and sound. Many civilizations value freedom, but the integral role sound plays in almost all aspects of Harpy life is a curiosity not seen in other species.
While human-like in appearance, the Harpy are an avian species expert in communication and reconnaissance. Colonies they join will be able to harness their technology to construct unique planetary scanners superior in performance to those constructed by any other civilization in the galaxy. In-Game Description
The Harpy are a Minor Faction that can be found throughout a galaxy. They prefer planets with moderate temperatures and a good balance between land and sea. When a planet with a native Harpy population is colonized, their population automatically joins the colony and can contribute to the planet's development.
Benefits to a Colony
A colony with a Harpy population will be able to construct a unique Harpy Scanner. Compared to the standard Planetary Scanner, the Harpy Scanner has a significantly wider sensor range and identical scanner range. Additionally, it can be upgraded without having to research the relevant technologies that would normally be needed to do so.
A previous description stated that the Harpy have a saying woven throughout their entire history - "Only the loudest song can reach the skies". Their advanced scanner technology was also explained in part by their natural ability to generate immensely powerful screeches.