It's the smallest hoofed animal in the world, and one of the rarest.
At full-size, the Philippine mouse deer grows to around 18cm and will weigh little more than 1KG, making them the smallest hoofed animal in the world. Despite their name, mouse deer don't actually belong to the deer family, they are, in fact, a member of the ungulates. Other animals that are members of the ungulate family include rhinos, giraffe and camels!
Males have tusk-like canine teeth to defend their territory from other males. Philippine mouse deer are nocturnal and mostly live alone, but will pair up for short periods of time. These herbivores eat a range of undergrowth vegetation, including leaves and flowers.
The Philippine mouse deer is part of a European endangered species breeding programme, and the first born in the UK was here at the zoo! They are an endangered species as their habitat is being destroyed to be used for farming, as well as being hunted for their meat. Due to these reasons, the population of Philippine mouse deer is decreasing each year.