I like to put my two hanging ferns outside when it's going to rain. They're normally on my screen porch, and a good bath and soaking perks them up.
This fern was only out for about 28 hours, but when I went to bring it back today I found it occupied. Apparently a pair of house wrens saw it as a cozy fixer-upper and built a nest in it. So instead of putting it back on the porch, I put it on a hook outside. Sure enough, I saw some birds checking it out a few minutes later.
The fern/nest is hanging on the hook where I keep my basket of mint, now temporarily relocated to the porch. I figure the birds need it right now more than I do. More on this as it develops.