Camels, unlike other animals, are particularly thirsty. The camel's hump stores fat. When the camel can't get food, the fat can be decomposed into nutrients needed by the camel's body for survival. Camels can go four or five days without eating, relying on the fat in the hump. In addition, there are many bottle-shaped bubbles in the camel's stomach, which is where the camel stores water. The water in these "bottles" makes camels safe even if they don't drink water for several days. Camels can live in the roughest part of scarce vegetation and eat spiny plants, shrub branches and hay that other animals don't eat, but they are willing to eat if there is better food. Camels store fat in their humps when there is plenty of food, and they use this reserve when conditions are bad. The fat in the hump is not only used as a source of nutrition, but also can produce water through fat oxidation. Therefore, camels can go without food or water for several days. According to records, camels survived without water for 17 days. Camels lose water slowly, and the dehydration amount reaches 25% of their body weight, which still has no adverse effects. Camels can drink 100 liter of water in one breath and regain their weight in a few minutes. Because of these characteristics, camels are called desert boats.

Fin whales are mainly distributed in Antarctic waters, and mainly feed on krill, mysis and copepods. In the North Pacific, they eat herring, saury, hairtail and squid; Krill is mainly eaten in the sea of China.

Lions usually prey on larger prey, such as bison, antelopes, zebras, and even young hippos, elephants and giraffes. Of course, small mammals and birds will not let go. Sometimes they take advantage of their large size to snatch the fruits of other carnivores, such as which leopard is in the wrong place at the wrong time, and even kill each other for it. In addition, they will eat the carrion of animals.

Peacock's food is mainly mushrooms, tender grass, leaves, termites and other insects.

Ostrich (also known as African ostrich) is the largest existing flightless bird. Produced in Africa. It feeds on plant stems, leaves, seeds, fruits, insects, worms, birds and reptiles. Ostrich mainly feed on plants and can live for a long time without drinking water.

Elephants-African elephants eat a lot and need 180~270kg of food and 120 liters of water every day.

People: omnivorous, eat about 1kg (including drinking water), sleep for 6-8 hours, and live for 70-80 years.

Hippos mainly feed on aquatic plants; I occasionally eat land crops, mainly grass, and sometimes I go to the fields to eat crops. When food is scarce, they also eat meat. It is said that hippopotamus is the largest carnivore (omnivore) on the road.

Dog's food intake refers to the total amount of food eaten by dogs in 1 day, which is related to dog breed, age, activity, feed quality and environmental conditions. Generally speaking, large dogs eat more than small dogs; Dogs of the same breed in the growth and development stage eat more than adult dogs; Dogs that live in groups and have a lot of outdoor activities eat more than dogs that are kept alone or kept in cages. When the feed quality and palatability are good, dogs eat a lot; Dogs eat more in autumn and winter than in summer.

The sea otter is not only the animal with the best fur in the animal kingdom, but also the largest eater on the earth, usually eating up to one-third of its weight in seafood a day. In other words, mature sea otters weigh about sixty or seventy kilograms, so they eat ten kilograms or even twenty kilograms of seafood on average every first day.

The giant panda's diet is very special, including almost all kinds of bamboo that can be found in the mountains. Giant pandas occasionally eat meat (usually animal carcasses). The unique food characteristics of giant pandas make them known as "bamboo bears" by locals. Bamboo lacks nutrition and can only provide basic nutrition for survival. The giant panda gradually evolved the characteristics of adapting to this diet. In the wild, pandas eat for as long as 14 hours every day except sleeping or short-distance activities. A giant panda eats 12 ~ 38kg of food every day, which is close to 40% of its weight. Giant pandas like to eat the most nutritious and least cellulose parts of bamboo, that is, tender stems, buds and bamboo shoots. Giant pandas usually have at least two kinds of bamboos in their habitats. When one kind of bamboo blooms and dies (bamboo blooms and dies periodically every 30~ 120 years), giant pandas can switch to other bamboos.