ruby-crowned kinglet Directory References Images Discover What’s the Difference Between Modern and Contemporary Art? 12 Greek Gods and Goddesses 7 of History's Most Notorious Serial Killers Is It ISIS or ISIL? New Seven Wonders of the World How Many Electoral College Votes Does Each U.S. State Have? 11 Egyptian Gods and Goddesses ruby-crowned kinglet bird Ask the Chatbot a Question Also known as: Regulus calendula Learn about this topic in these articles:description In kingletIn the ruby-crowned kinglet (R. calendula) of North America, the crown mark is a mere tick of red, appearing on the male only and usually concealed.Read More