If you are fishing in an area where there a lot of bugs flying around at night you may want to consider a wide-brimmed hat...it was the only way I could keep bats from coming so close to that I could feel/hear their wing beats near my ears. Also if you catch a bat with your smaller flies (trout fishing) reel them in to the tip of rod, drown them, pull of extra line, cut off the tippet and start over.