The Harpies are a neolithic race that are limited in their technological advancements by their constant fighting among themselves and tendency to pick fights with anyone, even stronger foes.
They have wings and large ears, appear otherwise human however. They are much lighter than a human due to hollow bones and different physique, allowing them to fly short distances. It also makes them much faster and they can skip over difficult terrain.
Their claws are razor sharp and make them deadly in melee. Keeping your distance will not save you however, as many harpies have the ability to throw orbs of lightning. Some scientists believed these powers could be improved upon with implants.
While being as versatile as humans when it comes to most forms of work they rely on their claws and lightning attacks for defense as they are incapable of wielding any type of weapon. And despite their beauty their need to fight will make them somewhat hard to integrate into a working colony, especially with other harpies around.
WARNING: They are a fairly challenging race. Their lack of joy and easy food buffs makes them hard to keep happy. Bloodlust as new need is brutal if not managed, as low bloodlust can lead to them going berserk, which is an extreme mental break. Beware. To manage Bloodlust allow them to attack any pawn (animal or humanoid) regularly. You can use prisoners, your own colonists or hunting, if you aren't attacked.