Always loved Monarchs since I read a book entitled Monarch X in first or second grade.
A pretty remarkable journey they make from the northeast US to Central America. Many do not complete the trip, of course. The children's book told the story of a scientist who marked many of the butterflies in order to identify their migration.
I recall clearly being quite sad for those who were killed or died en route to their summer home. However, I was amazed by those who made the entire trip, thousands of miles, to see the beautiful Gulf of Mexico...
Cheers!