Rain icon by Aha-Soft Team: link
Fire icon by Iconika.com (Denis): link
Wind icon by Aha-Soft Team: link
Forest icon by Afterglow (Cian Walsh): link
Bird icon by ArtDesigner.lv (Tanya): link

Rain sample by RHumphries: link
Fire sample by pcaeldries: link
Sea sample by Heigh-hoo: link
Forest sample by digifishmusic: link
Bird sample by suonho: link