"A less-common form of Hanuman is the Panchmukhi—that which has five heads or faces. Each head represents an animal. The five animals are the monkey (Vanar), the horse (Hay-griv), the lion (Narasimh), the boar (Varah) and the eagle. Some of these are incarnations of Vishnu. There is also an eleven headed Hanuman (ekadash-mukhi) Hanuman. These two forms are the result of the popularity of the tantric cults during the medieval era. The five-headed Hanuman may have as many pairs of arms, or just one pair. The eleven-headed Hanuman normally has ten pairs of arms."