Because this and other arboreal vipers are often encountered by locals, they have become familiar enough to warrant recognition in the native vernacular. In many parts of the Tagalog region, pit vipers are often called mandadalag due to the belief that these snakes feed on dalag (snakeheads or Channa ssp.), a supposition that stemmed from observations of these snakes waiting in ambush on low bushes over bodies of water. However, these arboreal vipers, as far as is known, do not feed on fishes. Another name applied, though less common, is tres kantos, which is an obvious allusion to the prominently triangular heads. Additionally, these are called rupong or dupong in the Bicol region and in the Visayas, and as papala in northern Mindanao. The Bicolano and Visayan name is similar to the Tagalog ulupong which applies on cobras; it may be that the term is a catch-all for venomous snakes, or even those perceived to be. The best known species, T. wagleri, is often called “temple viper” as these are often placed and revered in temples in parts of Southeast Asia. The two Philippine species are referred to as “Philippine temple viper”, but I find this designation ambiguous due to the simple fact that there are very few temples here, and that none are known to have these snakes around. Another variation is “Bornean keeled pit viper”, which doesn’t really make sense considering that the species is not found only on Borneo. Perhaps the name “keeled pit viper” suits this species just fine.