Myths About Rats
Myth
One, Two... Nine... Rats Per Person
Fact:
No one knows how many rats per capita exist in any city. It probably ranges from zero to several dozen rats per person in any given area. It is only safe to say we know there may be dozens or millions of rats in any one city, depending on many urban environmental factors.
Myth
Sewers Rats and Wharf Rats are Different
Fact:
Norway rats may be called "sewer rats", wharf rats, river rats, alley rats, house rats and barn rats. Some people mistakenly believe there are different "varieties" of rats according to these names. Roof rats may also be subject to similar misunderstandings.
Myth
Rats Must Gnaw or Their Teeth Will Continue To Grow
Fact:
Not true. Rats maintain incisor growth end sharpness by grinding the lower incisors against the uppers. They do not need to gnaw on objects, although they will supplement tooth grinding with object gnawing.
Myth
Rats as Big as Alley Cats
Fact:
The Norway rats that inhabit sewers are not necessarily any larger than their cohorts inhabiting an alleyway or park bush above ground. In fact, they could just as easily be smaller. In extensive studies of the sewer rats of London, the heaviest rat captured weighed 15 oz But larger rats have been recorded in and around farms. The heaviest Norway rat ever reported was 1.8 lb.
Myth
Rats Have Become "Immune" to Most Rodenticides
Fact:
It is true that many rats and mice are now resistant to the first-generation anticoagulant rodenticides. Luckily, however, so far most rats are still quite vulnerable to the second-generation anticoagulants.
Myth
Mother Rats Teach Their Babies to Avoid Traps and Poisons
Fact:
Young rodents avoid objects and food items simply by following their mother around just after being weaned. If the mother rat bypasses a trap or bait, a young rat may also bypass these items. The mother rat likely passed the baited traps due to more attractive resources further along or because she is fearful of any new objects.
Myth
Rats are Aggressive and Attack Children and Pets
Fact:
Some rats, if provoked and cornered, will fight their way out of the confrontation, as will many wild animals. But most rats do not outwardly attack humans. Young babies, bed-confined elders, and the homeless sleeping in doorways and alleys, however, are occasionally bitten by unprovoked rats. Most likely these individuals fall asleep with food residues on their hands or faces, and foraging rats attempt to lick or chew the food residues off the sleeping individual.
Myth
Sewers Rats Are Mutated - Blind and Unusually Large
Fact:
The Norway rats that infest sewers are neither blind nor unusually large.
Myth
Construction Causes Rats to Flee Sewers
Fact:
Not true. Rats are, for the most part, unperturbed by above ground street construction practices. In fact, they will not leave a suitable sewer system unless their burrows are directly excavated.
Myth
Rats Transmit Rabies
Fact:
The Norway rat & house mouse are not considered important reservoirs for the rabies virus in the U.S. Rat bites do not necessitate the victim being treated for rabies as is commonly done for dog, cat, bat, fox, raccoon and other wild animal bites.