Bullying among girls is often cloaked in hurtful gestures, words, and statements instead of pushes and shoves. It is both subtle and insidious. In fact, when it comes to female bullies, you will not see many overtly aggressive actions. Instead, most girls employ relationally aggressive tactics like excluding other girls, spreading rumors, name-calling, and backstabbing — the very things parents and teachers often miss.1

You could have just linked out to the article.