Few animals charm the internet like sloths, so Bing gives them their own quiz. The questions celebrate just how gloriously strange the slow life is, and the facts are so odd they're easy to remember.
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Why sloths are so slow
Sloths move slowly because they eat a low-energy diet of leaves, which digest incredibly slowly, a meal can take weeks. Their slow metabolism and low muscle mass keep them energy-efficient, and moving slowly also helps them avoid detection by predators like eagles and big cats.
Algae, and the weekly trip
Sloths move so little that green algae grows in their fur, providing camouflage and even a snack, a whole tiny ecosystem lives in there. And famously, sloths climb down from the trees only about once a week to go to the bathroom, one of the quiz's favourite 'wait, really?' facts.
Two-toed vs three-toed
The two main types are two-toed and three-toed sloths, and confusingly, all sloths have three toes on their back limbs, the names refer to the front. Three-toed sloths can rotate their heads almost all the way around, and they're surprisingly strong swimmers.
Answering approach
The standout facts, leaf diet and slow digestion, algae fur, weekly bathroom trip, cover most questions. For the two-toed/three-toed distinction, remember the count refers to the front limbs.
Frequently Asked Questions
Why are sloths so slow?
Their low-energy leaf diet digests very slowly, so a slow metabolism keeps them efficient, and moving slowly helps them hide from predators.
Why do sloths have green fur?
Algae grows in their fur because they move so little; it provides camouflage and even a snack.
How often do sloths go to the bathroom?
About once a week, when they climb down from the trees, one of the quiz's most surprising facts.