Give reason : The bat can fly, yet it is not a bird.

Explanation

### Step-by-Step Solution:

1. **Classification of Bats**: Bats belong to the class of mammals, not birds. This classification is based on specific characteristics that define mammals.

2. **Presence of Mammary Glands**: One of the key features of mammals is the presence of mammary glands. These glands allow female mammals to produce milk to nourish their young. Bats possess mammary glands, which is a defining trait of mammals.

3. **Body Covering**: Bats have hair on their bodies, which is another characteristic of mammals. Birds, on the other hand, are covered with feathers. The presence of hair indicates that bats are mammals.

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