德雷山脈自然公園(英语:Northern Sierra Madre NaturalPark)、巴丹國家公園(英语:Bataan National Park)、薩馬島自然公園(英语:SamarIslandNaturalPark)和奇坦蘭山國家公園(英语:Mount Kitanglad),但對伐木者和獵人的嚇阻和執法仍然較鬆散。
Redfern Natural History Productions, Poole. McPherson, S.R. & A. Robinson 2012. Field Guide to the Pitcher Plants of Sumatra and Java. Redfern Natural History
species from Mindanao Island, Philippines. In: S.R. McPherson Carnivorous Plants and their Habitats. Volume 2. Redfern Natural History Productions, Poole
Redfern Natural History Productions, Poole. McPherson, S.R. & A. Robinson 2012. Field Guide to the Pitcher Plants of Sumatra and Java. Redfern Natural History