Virgoan

The Virgoan were a time-active species who belonged to the Temporal Powers. (AUDIO: The Apocalypse Element) The Seventh Doctor once met a pigeon that was a Virgoan. (PROSE: Stop the Pigeon)

Biology
The Virgoans were shape-shifting, biomechanical symbiotes with an obsession for temproal tidiness. The Virgoans were excellent at discovering temporal anomalies and fixing them; fixing them badly, but with unbounded enthusiasm. (PROSE: Stop the Pigeon) Vansell claimed that the Virgoans had a reputation for being selfish. (AUDIO: The Apocalypse Element)

History
The Time Lords spent centuries trying to stop the Virgoans from badly repairing the Time Vortex, but had little success.

A Virgoan survey team once arrived on Melandra IV, only to discover that it was in the middle of a Krynoid infestation. The survey team became infected, and subsequently traveled to Earth. One of the Virgoan survey probe eventually worked out how to transform itself into vegetable matter, allowing it to absorb the Krynoid. (PROSE: Stop the Pigeon)

The Virgoans attended a time treaty on Archetryx. The signing of the treaty allowed the Virgoans to become part of the Temporal Powers. (AUDIO: The Apocalypse Element)