Theyyam also known as Kaliyattam, it is a ritual dance popular in north Kerala or the erstwhile Kolathunadu. Theyyam incorporates dance, mime and music and enshrines the rudiments of ancient tribal cultures which attached great importance to the worship of heroes and the spirits of ancestors. Of the over 400 Theyyams performed, the most spectacular ones are those of Raktha Chamundi, Kari Chamundi, Muchilottu Bhagavathi, Wayanadu Kulaven, Gulikan and Pottan. These are performed in front of shrines, sans stage or curtains, by persons belonging to the Vannan, Malayan and other related castes. Thudangal' (the beginning) and 'Thottam' (the invocation) are the introductory rituals of the Theyyam or the Thira, as it is known in south Malabar. The headgear and other ornamental decorations are spectacular in sheer size and appearance. Karivalloor, Nileswaram, Kurumathoor, Cherukunnu, Ezhom and Kunnathoorpadi in north Malabar are places where Theyyams are performed annually from December to April. At the Parassinikadavu Sri Muthappan Temple in Kannur, Theyyam is preformed on all days.