If you are referring to Heliamphoras, the only pitcher plants in South America, I would not recommend these in a dart frog vivarium. They require specialized care, much like highland Nepenthes. In their native habitat (the tepuis of Venezuela) they experience sometimes considerable temperature differences between day and night. They also do not come from the stereotypical South American rain forest, but from bogs and related area.
My advice is to stick with Nepenthes, Pinguiculas and Droseras are really too delicate to be constantly trampled on by hungry frogs, but some are suitable to environment. Uticularias are supposed to be a good choice, but they are hard to come by.
-----
David Knight
Tempe, AZ
D. imitator
D. leucomelas
P. terribilis
D. azureus
D. tinctorius (Alanis)