Here's why:
* Mammals are defined by several key characteristics, including:
* Having hair or fur (Star-nosed moles have fur)
* Producing milk to nourish their young (Star-nosed moles have mammary glands)
* Giving birth to live young (They don't lay eggs)
* Being warm-blooded (Star-nosed moles regulate their own body temperature)
Let me know if you have any more questions about star-nosed moles or other animals!