ADVERTISEMENT
Quokka
The quokka, also known as the short-tailed scrub wallaby. Known as the happiest animals in the world, Quokkas are herbivores who primarily feed at night, meaning they are mainly nocturnal. They eat the leaves, stems, and bark of many plants in addition to grass. If necessary, they can survive for long periods of time without food or water by living off the fat stored in their tails.