The Star - Rare tortoises are branded to make them unattractive to poachers.

BuzzFeed - An initiative to deter poaches from selling the endangered ploughshare tortoises on the black market has lead to a unusual strategy.

Smithsonian.com - If the tortoises' shells are marred with numbers and letters, they'll be less appealing to poachers

ABC News - Some of the rarest tortoises in the world are a hot commodity on the black market for their unique golden shells which can sell for tens of thousands of dollars.

Los Angeles Times - The booming illegal international wildlife trade forced conservationists to do the unthinkable Tuesday: Brand the golden domes of two of the rarest tortoises on Earth to reduce their black market value by making it easier for authorities to trace them if stolen.