Xindi-Avian

The Xindi-Avians are an extinct species of sapient volant lifeforms and were the sixth sapient race native to the planet Xindus. History says the Avians once darkened the skies with their numbers, but their technology wasn't as advanced as that of the other five races. Unlike the others, the Avians were not able to evacuate the planet by the time of its destruction. Nothing else is known about them and only a fossilized cranium has been seen, which appears very similar to the cranium of an Earth giraffe.