I used to work in a building with a drosophila fly lab. From time to time, I'd visit the lab, use CO2 gas to knock a fly out, and then place it in my venus fly trap (you have to flick the little hairs in the trap a couple times to get it to close). The fly wakes up, and since it's alive and jiggling, the trap stays shut. About a month little the trap opens again, and a little husk of dessicated fly drops out. Afterwars, the plant grows nicely