For gift-givers looking for an unusual and distinct present, the International Rhino Foundation is auctioning off dried and mounted specimens of rhino poop.

The pieces of dung, collected from the white, black, Indian and Sumatran rhinos, are being sold on the online auction site eBay.

"The IRF wants to call attention to these marvelous species – and to share every detail of information that people might not know," the group says on their website. "Not only do rhinos need our help, every aspect of rhino biology is fascinating. Including, pardon us, rhino poop."

The IRF says rhinos mark their territory by creating borders made of their feces and urine.

There are 17,500 rhinos surviving in the wild, with another 1,200 in captivity.

With files from the Associated Press