warbler is a kind of bird. Years ago when I started to play a computer game called Wing Commander, it asked me for a callsign, a nickname that my character would be refered to throughout the game. I couldn't think of anything to use. On table near where the computer was, a book on birds was sitting. I turned to a page at random. The page I happened to stop on was talking about warblers. So, I used that name in the game. From then on whenever I needed a name for a computer game, or a nickname for a forum or somthing of the like, I used warbler. And of course when I join here I did the same.