Diego, a Hood Island tortoise, has been sent back to the Galapagos Islands after having raised his species’ population to 2,000 from a mere 15. Hood Island tortoises are an extremely rare species of giant tortoises that are unique to Española, also called Hood Island, one of the islands of the Galapagos. However, since their population size was decreasing drastically, the Charles Darwin Research Station started a programme to raise and care for the tortoises in a protected area. Diego was recruited for this programme and was moved to a zoo in California, USA, for 30 years where he took part in a breeding programme. After having helped produce close to 40% of the Hood Island tortoise population, Diego has been allowed to go back home.