Finishing a Beading Project

[nezzie.livejournal.com]

So I have been making these beaded birds. And so far have just been tying them off when done...but is there a better/safer way to make sure it'll stay secure? I use a nylon thread. Should I try applying some heat? Or a dab of glue? Nothing has fallen apart, but if I want to make these for gifts I want to be sure they won't fall to bits! TIA!