Sloths only defecate once per week and they lose up to 30% of their body weight when they poop, making it the most dangerous time in their lives.

Sloths risk death every time they poop once weekly. They lose 30% of body weight per bowel movement. Must climb down from safe tree canopy. Predators wait specifically for toilet time. Process takes 30 minutes of vulnerable exposure. Evolution's strangest bathroom schedule almost kills them.