The upper pitchers of N. jamban have been noted for trapping many large prey items, such as wasps and crickets, and relatively few small animals.
The traps of this species also support large populations of pitcher infauna, particularly mosquito larvae.

Nepenthes jamban produces thick, mucilaginous pitcher liquid similar to that found in related species such as N. inermis.
The pitchers of N. inermis function not only as pitfall traps but also as flypaper traps, with the sticky inner walls trapping flying insects above the surface of the fluid.
A similar trapping method may be employed by N. jamban.
The upper pitchers of N. jamban have been noted for trapping many large prey items, such as wasps and crickets, and relatively few small animals. The traps of this species also support large populations of pitcher infauna, particularly mosquito larvae.
Nepenthes jamban produces thick, mucilaginous pitcher liquid similar to that found in related species such as N. inermis. The pitchers of N. inermis function not only as pitfall traps but also as flypaper traps, with the sticky inner walls trapping flying insects above the surface of the fluid. A similar trapping method may be employed by N. jamban.
Nepenthes jamban