Like I mentioned before, there are more carnivorous plants out there than you probably realized (more than I realized, anyway). The Cape Sundew eats insects not with rapid movements, or weird pitcher shaped appendages, but instead by slowly wrapping its arms (by that I mean leaves) around prey. This is slow, on average about 30 minutes, and probably fairly cruel. This is also the first plant on the list that is very good at reproducing. Not only can it reproduce, but it can survive large fluctuations of temperature and water availability as well. So thats why humans like to keep them, because they allow for carelessness when they are being grown. It is originally from South Africa and is invading New Zealand (Its hard to rid a large area of them!).