Glo Bug Red - Egg Fly. The Red Glo Bug is on of the most popular and definitely among the most deadly of egg imitations that have ever been used. The Glo Bug Red can be used for Steelhead and Salmon and can be guaranteed to produce fantastic results. This imitation can be fished like most other egg replications, by fishing it dead-drift along the bottom of the river bed. This simulates an egg that has broken loose and the awaiting trout or salmon simply cannot resist. This fly can be fished on any form of water including rivers, lakes, and anywhere with spawning fish to be totally honest.