Antron egg is an excellent egg pattern developed by Tim Flagler. Imitating fish eggs like trout and salmon. Works anytime, but best when the trout are spawning. I have landed my biggest brown on this egg pattern on the White River Arkansas. Makes a great dropper for a double dropper following an ugly princess with 4X to 6X tapered leader and tippet. Or dead drifting underneath a strike indicator is an excellent choice.