* Many rabbit breeds come in brown: There are tons of rabbit breeds, and many have brown fur variations.
* Tail color varies: Tail color in rabbits depends on the breed and even the individual rabbit's genetics. Some brown rabbits might have white tails, while others might have brown, black, or even a combination of colors.
* "Brown" is a wide range: Brown isn't a single color. There are many shades of brown, from light brown to almost black.
To know if a specific brown rabbit has a white tail, you'd need to see it!