How good would it feel if you could just hang out and do absolutely nothing all day? That's exactly what sloths do, but don't let their slow pace fool you. Sloths are around three times stronger than humans and can hang on tight enough to fend off a jaguar.

Sloths are tree-dwelling mammals native to Central and South America. Their deliberate movements conserve energy, avoid predators and even allow algae to grow on their fur, creating green camouflage among the canopy. Hoffmann's two-toed sloth, pictured here, is a prime example of the slow-paced lifestyle typical of all sloths. It spends most of its time in the trees, occasionally descending to the ground to move to a new one. Beyond their charm, sloths play a crucial role in tropical forests. Their presence signals a healthy ecosystem and protecting their habitats benefits various other species, including frogs and birds.