- "My grandfather lived there. There were times when he recalled the sky was filled with Avians."
The Xindi-Avian species was an extinct member of the Xindi race, wiped out during the conflict between the six Xindi species which destroyed their homeworld, sometime in the 2030s. As far as known, none of them fled before their homeworld was destroyed.
The remains of an Avian settlement were found on a planet that dated back to the 2nd millennium BC. The ruins of the settlement were used for the meeting place of the Xindi Council. (ENT: "The Council")
|Aquatic • Arboreal • Avian • Insectoid • Primate • Reptilian|
Background information Edit
The Xindi-Avians were originally devised as a sixth member of the Xindi Council, though this idea was discarded due to uncertainties concerning how to actualize them as physical designs. Executive Producer Brannon Braga explained, "We did [consider avians, or bird people, among the original five], but we thought two CGIs [the Xindi-Aquatics and Insectoids] were enough–and you don't want to do actors as bird people." (Star Trek: Communicator issue 149, p. 50) The prop used for a Xindi-Avian skull in "The Council" was a model replica of a giraffe skull. 
According to the non-canon book Star Trek: Federation - The First 150 Years (pp. 57, 56, 53 & 52), the Xindi-Avians were the only Xindi species that did not trust nor believe stories from the duplicitous Sphere Builders. The book contains an illustration of an Avian, which the publication describes as "the only known image" of a member of the species, and an historical writing involving an encounter between an Arboreal child named J'Acov and an Avian, on the final day of the Xindi homeworld. Apparently written by J'Acov, the account details how, having climbed up a remarkably thin stalk to reach the doorway of an Avian home, J'Acov saw the Avian fly directly at him, land on one of several thick vines surrounding the dwelling, then ask, talking in a harsh rasp, "Why have thee invaded my home?" The document also mentions many nightmare tales, all of which had been heard by J'Acov, of angry Avians plucking Arboreal children from their homes.