Lion
Lions operate on a feast-or-famine metabolic model, capable of consuming up to 40 kilograms of meat in a single sitting before potentially not eating for several days. This approach requires significant energy expenditure during hunts, with success rates averaging only 25-30% for solitary attempts.
The Serengeti Nutritional Efficiency Council calculates that lions spend approximately 20 hours daily resting specifically because hunting is 'absolutely exhausting and frequently unsuccessful.'
Panda
The panda's commitment to bamboo represents one of evolution's most baffling dietary decisions. Despite possessing the digestive system of a carnivore, pandas insist on consuming a plant that provides minimal nutritional value, requiring them to eat 12-38 kilograms daily whilst extracting only about 17% of available nutrients.
However, researchers at the Sichuan Institute of Impractical Feeding Strategies note that bamboo is 'essentially everywhere' in panda habitats, meaning the panda never experiences hunting failure. The bamboo simply sits there, being bamboo, waiting to be consumed. This represents a 100% success rate in food acquisition, albeit at tremendous volume.