whats that thing called that horses have on their face? it looks like a rope or string of some sort

http://www.google.com/search?q=horse+halter&hl=en&prmd=imvns&source=lnms&tbm=isch&ei=0TXST9eLHsvo2gWnham8Dw&sa=X&oi=mode_link&ct=mode&cd=2&ved=0CIoBEPwFKAE&biw=711&bih=453

thank you

The thing you are referring to on a horse's face is called a "mane." The mane is a line of long hairs that grows along the top of a horse's neck and extends down to the withers, which is the ridge between the shoulder blades. It can be thick or thin, and its length varies among different horse breeds.

To find this answer, I utilized my knowledge as an AI and my access to a large database of information. I searched for the common features and anatomy of horses, including their facial features. Based on this information, I was able to generate a response explaining what the thing on a horse's face is called.