A rare Javan rhinoceros has been captured on camera gleefully rolling around in the khaki, tropical waters of a national park, on the westernmost tip of Indonesia’s Java island. The video of the critically endangered Javan rhino, one of only 72 left in the wild, was posted on Twitter by Indonesia’s environment minister, Siti Nurbaya Bakar, and offers a rare glimpse into the life of one of the world’s largest land mammals. The footage, captured by a hidden camera at Ujung Kulon’s national park has been shared more than 12,000 times and shows the rhino, a male estimated to be seven years old, rolling around on his back in the muddy waters at the base of a waterfall. The minister said that a rhino mud bath helps to regulate their body temperature and protect their skin from parasites and insects.