Posts Tagged ‘Subject Browse’
It is groundhog day again–it seems like the last one was only yesterday. A few years ago, a colleague did a great post on Groundhog Day itself, so I won’t repeat that here, but I started thinking about rodents (the groundhog is one). Here are a few rodent morsels on which to chew. (Ew, that didn’t sound right.):
–Rodents are from the order Rodentia, and they account for around half of all mammal species. (Note about this link: This takes you to the subject browse area of eLibrary. Anything with a yellow star next to it includes a Research Topic page.)
-The word “rodent” comes from Latin word meaning “to gnaw.” This makes sense, considering that their large front teeth and gnawing habit are probably the things that most define them in our minds. They gnaw because those front teeth grow continuously and failure to wear them down would result in death from starvation or impalement of the skull.
-The smallest rodent is the pygmy jerboa, only about an inch long. The largest rodent in the world, currently, is the capybara, but its extinct cousin Josephoartigasia monesi was the largest ever, measuring in at eight feet. And just for the awwwww-factor, here is a picture of two cute baby capybaras with their mother.
-Among the common animals that are mistaken for rodents but are not, are the rabbit and the opossum, which is a marsupial. (Speaking of marsupials, here is a crazy one: the Tasmanian wolf. It became extinct in the 1930s, and scientists had hoped to bring it back through cloning. He sure doesn’t look like a kangaroo.)
-Most rodent species are highly social. In an interesting experiment, a researcher showed that rats show empathy by working to free others from cages.
-While they were once killed in huge numbers for their pelts and to eliminate them as pests, beavers, the second-largest rodents, are becoming respected for the benefits they provide, including erosion prevention, improvement of fish and wildlife habitat and soil enrichment.
-On the other hand, some rodents can carry diseases deadly to humans, including plague and hantavirus.