The Brown Rat – Rattus norvegicus

The Brown Rat has Greyish-brown fur, a prominent pointed muzzle, eyes, large ears and long, almost naked, tail, about the same length as the head-and-body. Much larger than any mice, but comparable with the much darker, shorter-tailed water vole in general size, the Brown Rat is less ‘chubby’ in appearance. Head & body: 15-27cm. Tail length: 10.5-24cm. Weighing 40g at weaning, up to 600g as an adult. Most Brown Rats are usually Between 200-300g.