Rat species are found throughout the order Rodentia. Stereotypical rats are found in the genus Rattus, which includes some of the better-known species of rat, such as the brown rat (Rattus norvegicus) ...

Techniques for blood collection from the rat include puncture of the heart, retro-orbital plexus, jugular vein, saphenous vein, tail blood vessels, carotid artery, abdominal aorta, and vena cava. Most ...

Q. What are nutria, and why are they now considered a pest? Nutria (or coypu) are like gophers on steroids. Since they live near water, they are often mistaken for beavers or muskrats. There are some ...