Scientists didn’t expect capybaras to eat both grasses and forest plants. The rodents’ flexible diet helps them live everywhere from cities to swamps.

In Japan, there's a competition for capybaras in five different zoos to mark Watermelon Day. Find out more here.

Sean Van Alphen was in the Dryandra Woodland National Park in Western Australia surveying numbat numbers when he witnessed the grisly encounter.

The capybaras representing each zoo competed for time by seeing which one could finish eating about 500 grams of watermelon with the skin remaining the fastest.