A rare albino echidna has been returned to the wild on the outskirts of Canberra.

Casper has spent the past two weeks recuperating after he was found on the side of a busy Canberra road.

It has been suggested only one in 10,000 echidnas are albino.

RSPCA spokesman Michael Linke says it is a once-in-a-lifetime discovery.

"[It's a] very, very rare animal," he said.

"It's an actual privilege to see an animal like this up close."

Brett McNamara from the ACT Parks and Conservation Service says Casper's "beautiful condition" made the find all the more special.

"Particularly in the context of the nation's capital, to find an albino like this, literally a stone's throw away from Parliament House here in Canberra, is quite a remarkable find," he said.

Casper was released at Tidbinbilla, a protected nature reserve with a healthy echidna population.

Mr MacNamara says he hopes Casper will be lucky in love.