According to an article published by Michigan State University, "Only about 5 percent of monarch eggs survive to become butterflies." Why is that? Is something eating them? To find out, "doctoral student Andrew Myers set up 24/7 surveillance to determine who is preying on the eggs."
"To read more about Myers and his project, read his perspective in MSU Today: Andrew Myers: Working the Night Shift. Also, watch the video below on why Myers chose to study monarchs."