Possible albino kangaroo spotted in SA

What's thought to be a rare albino kangaroo has been spotted near the River Murray in South Australia.

The rare roo was snapped on the side of a road at Big Bend, near Swan Reach, about 175km east of Adelaide.

"Doesn't look real does it? But let me assure you that it was a real live albino kangaroo," Riverglen Marina Houseboat Hire wrote on Facebook.

But the Bordertown Wildlife Park, which has a number of not-so-rare white kangaroos, said it was difficult to know just how rare albino kangaroos were.

"Apart from the one we caught here in the early 1970s, this is the only other one I've heard of," committee chair Adrian Packer told AAP on Thursday.

Albino kangaroos can easily be mistaken for whites which are a genetic strain of the western gray.

"Bar catching it and getting up really close to see if its eyes are red, it's hard to say," Mr Packer said.