That would be referred to as a 'nest'.
rats live in basements or cellars
A rat's home is called a burrow. These underground tunnels provide shelter, protection, and a place for nesting. Rats are known to create complex burrow systems with multiple entrances and chambers.
An adult rat is called a rat.
In the wild, it's a burrow. I'd imagine the term "cage" is just fine for domesticated rats though.
maybe because they are also called the "grass cutting rat"
The St. Louis Cardinals home field is Busch Stadium.
No, she is a Field Mouse.
If it is a male rat then it become sterile.A castrated rat is a sterile rat.
Wrigley Field
A male rat is called a buck.
it is called a flying rat
giant rat