Interesting Animal # 99 - Cats

Cats use their purr to manipulate humans.

(Researchers at the University of Sussex have learnt that cats use a special kind of purr -- a "soliciting purr," -- to get their bowls filled. This purr is different from the normal "carry on stroking me" purr in that it contains frequencies more irritating to the ears of humans. The message being, wake up and feed me.)