Mid-Flinx, by Alan Dean Foster (it's part of the Pip & Flinx series that in turn is part of the Humanx Commonwealth series). It takes place on a planet completely covered by jungle, and all the plants are predators of some kind. There are humanoids living there who know how to survive, but drop a group of non-natives there who don't know how and don't respect the natives who are trying to tell them "don't go there, don't do that, don't move, that's not safe to eat, hold your breath, don't touch that..." and you get a novel where some characters die some very gruesome deaths.
And after you've read the book, do not try to use jungle sounds for mood music to help your insomnia. It won't work. You will also end up wondering if your house plants are secretly plotting your demise (ADF said he got the idea for Midworld from his house plants).