"black rat" 的定义和意义

What is a "black rat"?

The black rat, also known as the ship rat or roof rat, is a species of rodent in the family Muridae. It is a medium-sized rat with a slender body, large ears, and a long tail that is longer than its body length. The fur of the black rat is usually dark gray to black in color, and its eyes are relatively large and dark. Black rats are excellent climbers and are known for their agility and adaptability. They are found in various habitats, including urban and rural areas, and are known to be associated with human structures such as buildings, ships, and storage areas. Black rats are omnivorous, feeding on a wide range of plant and animal materials. They have a rapid reproduction rate and can be considered pests in some areas due to their ability to transmit diseases, cause damage to property, and outcompete native species in certain environments.