I love wrens! So cute. I've had one nest in the middle of a hanging plant before, and once in a watering can that was laying sideways on a little table under the carport. It got there before I did that spring, so I didn't use that can that year. Both nests were successful and we got to watch the "egg to baby in the nest to empty nest" process for both. These are the friendly birds that occasionally find a pretty small hole in a screen that I can never remember to fix, and come in to see what's up.