Brown Rat Rattus norvegicus
The Brown Rat or Common Rat is also called the Norway Rat although it came from Asia rather than
Scandinavia and has spread worldwide. It can be greyish brown.
Summer coat (Singapore).
Winter coat (UK).
The tail is as long as its body.
Rats can burrow, climb and swim well.
The Brown Rat climbs well, both trees and houses (although not as well as the Black Rat, also called Roof Rat in America).
Baby Brown Rat
Juvenile Brown Rat (the young are greyer than the adults)
The rat that liked escargot - see link below
Links:
Rat collecting snails
Rat and Squirrel
Black Rat