My Animal Friends -- Polar Animals, River Animals

Author: Tian Zhansheng
Publisher:
Publish Date: 2005-04-01
Features: Polar Animals: The Earth's south and north poles are known as the "Antarctic" and "Arctic" polar regions. These are the coldest places on Earth, where temperatures rarely rise above freezing. As a result, both land and sea remain perpetually frigid and covered in ice and snow. In summer, the sun never sets; in winter, the sun does not rise, plunging the region into darkness from morning till night. The harsh natural environment makes the polar regions uninhabited, yet some adorable creatures still survive there with resilience, such as whales roaming the Antarctic waters, emperor penguins breeding in Antarctica, and polar bears, seals, and more. To adapt to the ice and snow, some of them have thick fur or down, while others rely on the fat stored in their bodies for warmth. Most polar animals are white, which helps them blend into the snowy landscape. In human eyes, the poles are seen as lifeless, unconquerable zones, yet they are ideal habitats for many animals. Perhaps it is precisely because humans do not intrude here that the animals living in the polar regions can enjoy such a peaceful and joyful life.
River Animals: Rivers nurture a vibrant world of flora and fauna: the water surface is covered with tiny floating plants, and abundant aquatic weeds drift along. The banks are lined with reeds and rows of trees. These generous gifts of nature attract countless species of animals. Overall, the composition and distribution of river animals depend on factors such as the section of the water body, its width, flow speed, depth, and substrate. The upper reaches of rivers are characterized by fast currents, relatively stable temperatures, and high oxygen levels in the water. To obtain rich oxygen and maintain a relatively stable temperature for hatching, many fish species choose to breed here. In the lower reaches of rivers, the current is slower, oxygen levels are lower, and the riverbed is mostly rich in organic matter, with silt and sand. As a result, the biodiversity in this section is much greater than in the upper reaches. The arrival of animals brings vitality to the rivers, and the rivers themselves are also a colorful world, providing a thriving paradise for the creatures that call them home. Let us enter this beautiful and mutually beneficial world together!