The Reeves pheasant was seen by Almondbank resident Arthur Bruce as he drove at Tullybelton, near Bankfoot.
The bird is native to China and was introduced to Europe as an ornamental bird in 1831. A few pairs are believed to have escaped to the British countryside but the species is not classed as wild.
Its plumage differs greatly from the common pheasant, where the male has a green and red head and a golden brown body.
Instead, the Reeves pheasant has a black and white head and a golden body with patches of black and white. It has the longest natural tail of any bird, with feathers growing up to eight feet long.
A spokesman for Birdguides, which specialises in software and DVDs for birdwatchers, said: “As far as I know, there are a few pairs in isolated populations, although quite how many are distributed across the country is a bit of a mystery.
“The species is not included on the official British bird list.”
