Overview: A savage little beast eats constantly to support its high metabolism. Of the more than 4000 species of Mammals on earth, the tiny Shrew has earned a reputation for being the most voracious. It devours almost anything in its path, including creatures much larger than itself. Its heart is hardly malicious, but beats at a rate of 1000 times a minute. This reflects a metabolism which requires the Shrew to consume several times its body weight daily.