Proboskians are a alien species who are notable for their trunks.
History
In 1947, 9 Proboskian gyroships were on an expedition to Seattle 300 to examine earthly Elephants. The species is utterly convinced that elephants are the true intelligent species on earth.
The ships were spotted over the Cascade Mountains, an event which would later largely be known by earth-men as the Arnold Incident, a sighting which helped thrust the name "flying saucer" into popular vocabulary.