The arboreal mammals mainly include the apes of the highest level of evolution and primates. In addition, the rodents (commonly known as squirrels), giant squirrels, squirrels, squirrels, and dormouses in the rodent order; The tree and the civet cats and leopard cats are also active in the tree. There are more than 200 kinds of primates, including us humans. There are 18 species of wild apes in China, accounting for about 9% of this species of animals. Among them, there are special animals, golden monkeys, Taiwan monkeys and white-headed langurs. Primates are mainly distributed in the tropical regions of Asia, Africa and the Americas. The largest size is a gorilla weighing more than 200 kilograms; the smallest dwarf lemur weighs only 50 grams. 1. The shape of primates is medium-sized, the brain is highly developed and has a large spherical cranial cavity; the hands and toes can be separated, the thumb can usually be grasped, and the hands and feet become powerful grasping organs; most species have short nose and some have extreme nasal bones. Degradation, such as China's specialty animal golden monkey formed upturned nostrils, so people also called it nose-nosed monkey. The eyes of primates are facing forward and the distance between the jaws is also short. Unlike their counterparts, their fingers can only flex and stretch at the same time. The palms and chins are bare and have soft and wide foot pads. Most types of fingers and toes have Flat armor (Figure 1-2). 2. Ecological animals of this type generally live in tropical, subtropical and temperate mountain forests, and the altitude of their habitat varies according to species and season. They usually live in arboreal, semi-arboreal social life. During the day, there are only a few species, such as monkeys, monkeys, and monkeys. When they are active, they are grouped together in a family, and sometimes they form a large group. Each group has a different number. There are monkey kings in the group to lead the monkeys for food and roaming. At this time, the female monkeys and the young monkeys are in the middle of the ranks and transmit information in different actions. When they stop, all the adult monkeys climb up and hope to find that dangerous situations are called alarms. With highly developed sensory organs, agile movements of the limbs and fingers and toes suitable for climbing and grasping, can quickly jump and jump between trees. The gibbon's forelimbs can be transferred from one tree to another tree just a few meters away. Monkeys rely on their long tails, which can keep their bodies balanced. They can quickly move between the branches and branches of the forest. Primate foods are very complex, mainly fruits, cereals, but also eat bamboo shoots, carrots and other food. They breed once a year. They have one baby per birth and occasionally two babies. The pregnancy period is about 180 days. The born larvae hold the mother's chest and abdomen in the breastfeeding period, and sometimes crawl on the back of the mother's body. Activities, starting an independent life after one year. 3. Economic Significance Primates are not only ornamental animals, but more importantly, experimental animals in the medical and aerospace fields. They also have great research value in scientific research and should be protected. Monkeys also invade farmland and eat food crops. Their food intake is small but severely damaged. Although humans are close relatives, the threat to these animals is also greatest. At present, the number of populations has dropped sharply due to large-scale felling and uncontrolled hunting. Therefore, apart from taking measures to control its harm, we also need to strengthen the management of natural reserves and the construction of artificial breeding centers to benefit their survival and reproduction.
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