A cotton rat is any member of the rodent genus Sigmodon. They are called cotton rats because they build their nests out of cotton, and can damage cotton crops. Cotton rats have small ears and dark coats, and are found in North and South America. They are primarily herbivores. The molars of cotton rats are S-shaped when viewed from above. The genus name literally means S-tooth.
Sigmodon hispidus was the first model organism to be used in polio research.
Read more about Cotton Rat: Classification
Famous quotes containing the words cotton and/or rat:
“We are constituted a good deal like chickens, which, taken from the hen, and put in a basket of cotton in the chimney-corner, will often peep till they die, nevertheless; but if you put in a book, or anything heavy, which will press down the cotton, and feel like the hen, they go to sleep directly.”
—Henry David Thoreau (1817–1862)
“A rat eats, then leaves its droppings.”
—Hawaiian saying no. 85, ‘lelo No’Eau, collected, translated, and annotated by Mary Kawena Pukui, Bishop Museum Press, Hawaii (1983)