Mangatyanan (English: The Blood Trail) is a 2009 Philippine independent film written (under the pseudonym Ramon Ukit), directed, edited (under Pats R. Ranyo), and scored by Jerrold Tarog.

[2] The film tells the story of Himalaya "Laya" Marquez, a 27-year-old travel photographer who projects a cold, aloof persona to her family and workmates.

Not long after, Laya and new co-worker, Eric, assigned by their boss, Queen, to document the Mangatyanan blood trail ritual of the Labwanan, fictional Filipino tribe created for the story, before the practice dies out forever.

When the pair meet the Labwanan, they discover a severely dwindled group whose cultural identity is now asserted only by their tribal leader Mang Renato.

"[4] In a disclaimer at the end of the film's credits, Director Tarog notes that: "The Labwanan Tribe of Dimacan, their languages and customs, including the Mangatyanan Ritual are products of fiction created for the purpose of allegory.