The word "rodent" frequently conjures up an image of either a rat or a mouse. Yet rodents are among the most diverse mammal species on Earth. They include more than 2,000 species-40 percent of mammal species. In the Bay watershed, rodents range in variety and size from the beaver, which can weigh up to 110 pounds to mice, which weigh a fraction of an ounce. This quiz will test your "gnaw"ledge of these amazing creatures.

1. What is special about the two pairs of front teeth (one on the upper and the other on the lower) jaw?

A. They are sharp enough to cut through steel.
B. They are constantly growing.
C. They are self-sharpening through gnawing.
D. Both B & C

2. Rodents' teeth set them apart from other mammals. Which of these teeth do rodents lack?

A. Canines
B. Incisors
C. Molars

3 True or false? All baby rodents are born naked and helpless.

4. Rodents are eaten by almost every predator. What helps to keep these animals abundant amid all of this hunting pressure?

A. Small size
B. Frequent litters
C. Ability to eat a variety of food
D. All of the above

5. Which of these animals is a rodent?

A. Porcupine
B. Rabbit
C. Shrew
D. Weasel


1-D, 2-A, 3 -False, 4-D, 5-A.