Get Animator current Animation using script ? Possible ?

I have this simple animator; 2 layers, Idle and Walking and a Blend Tree

I'm trying to catch if a specific animation is currently playing:

 _anim = GetComponent<Animator>();
 if( _anim.GetCurrentAnimatorStateInfo(0).IsName("Idle.IdleLeft"))
 {
     Debug.Log ("Idle Left !");
 }   

But i cannot get it to work. What am I obviously missing here ? Thanks !