the.com/monarch butterfly

means A large orange-and-black butterfly famous for an epic, multi-generation migration between North America and overwintering sites in Mexico or coastal California.

from Named not for any royal behavior but in tribute to royalty itself — early English settlers in North America called it 'monarch' as an homage, most likely to King William III of England (William of Orange), whose title made the butterfly's orange livery feel like a crown. Its scientific name, Danaus plexippus, reaches further back, borrowing from Greek myth: Danaus, a legendary king of Egypt and Argos. So the insect carries two monarchies in its name, one folk, one classical, long before anyone understood it was also navigating by the sun.