Norway Roof Rats Marin

Norway rats rattus norvegicus are the larger of the two rat species at about 11oz its head body is longer than its tail a diagnostic feature.

Norway roof rats marin.

There are two species of rats that commonly become a problem in and around homes in marin and sonoma counties. And also because the norway rat can quickly adapt to the changes in the temperature compared to the roof rats. These two species can be differentiated by physical characteristics and habits. The fur of roof rat is smooth while the fur of the norway rat is rough and shaggy.

Roof rat roof rats rattus rattus sometimes called black or tree rats are smaller than norway rats they have pointed muzzles and tails longer than their head and body combined. Roof rats leave behind the most evidence of their presence in elevated places where they prefer to nest. The norway rat is larger and more aggressive than the roof rat. Roof rats have black fur with pale underbellies while norway rats have brownish gray coats.

Additionally the roof rat typically has a much longer tail. There are two non native rats that call marin home. Another way to differentiate between the two rodents is size. It lives mainly in burrows and sewers and is an excellent swimmer and occasional climber.

Adult roof rats measure about eight inches in length while norway rats can be up to ten inches long. Roof rats being the smaller sized ones with a considerably slender body. Norway rats tend to look more well fed and rounder than roof rats with small eyes close set ears and a shorter tail. Roof rats are agile climbers and usually live and nest above ground in shrubs trees they particularly like palms and dense vegetation such as ivy honeysuckle and blackberries.

The adult roof rat is about 7 10 inches long and weighs about 5 9 ounces. On the basis of the tail size. Because norway rats tend to be larger their droppings are also larger about 3 4 inch long whereas roof rat droppings are usually about half an inch. While roof rats excel scaling your roof norway rats are powerful swimmers.

While the signs of roof rats and norway rats are similar there are a few differences that aid in exclusion and removal. The larger norway rat rattus norvegicus also known as brown sewer or wharf rats are stocky with a blunt nose and a tail shorter than their body. Roof rats and norway rats are the two rat species most likely to enter homes. Both species have several common names please see our rat brochure for a list of these names.

The roof rat rattus rattus and the norway rat rattus norvegicus. It is found in all the states in the usa but in coastal states the roof rat is more dominant. Roof rats and norway rats. The norway rat rattus norvegicus is also called sewer rat brown rat water rat wharf rat and gray rat.

The diet of the roof rats is entirely different from their brethren species. Moving in an area up to 150 feet in diameter norway rats burrow along building foundations beneath rubbish or woodpiles and moist areas in and around gardens and fields. The main difference between roof rats and norway rats is their behavior. Roof rats rattus rattus are smaller than the norway at about 7oz its tail is longer than its head body.