Eukanian

Eukanians were a humanoid species who made chittering noises.

History
At least one of them attended the Festival of Offerings at least once. (TV: The Rings of Akhaten) Another was present at the Maldovorium when River Song was in the market for a vortex manipulator. (TV: The Pandorica Opens) Another was present in the Zaggit Zagoo bar on Zog at the same time as Jack Harkness. (TV: The End of Time)