Kukulkan's species
Kukulkan's species were a race of intelligent, technologically advanced, spacefaring, winged s. 

Their wings and tails were feathered and they possessed a feathered mane at the base of their skulls that was in turn adorned with a single backward-curving . Their lifespan lasted thousands of years. 

Kukulkan's species fell into near extinction some time before Humans gained the ability to control fire on Earth, leaving Kukulkan himself as the only survivor. 

In 2270 the crew of the  had the official first contact. ()

Unnamed species