Species Characteristics
Click on the names to see their specific characteristics.
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Norway Rat - Rattus Norvegicus
Norway Rat – Rattus Norvegicus
Often known as the Norway rat but also the common, sewer or brown rat. Body length 220 to 260mm with tail 160 to 200mm. They can breed throughout the year, producing litters of an average 6 young after a gestation period of just 21 days. A female will usually produce a litter 5 times a year.a
Black Rat - Rattus Rattus
Black Rat – Rattus Rattus
Smaller and slimmer than the Norway rat, they tend to be between 160 and 240mm in length. Their breeding and gestation periods are similar to those of the Norway rat.