Numerous milkweed butterflies in other parts of the world seek out pyrrolizidine alkaloids (PAs), as seen here in Danaus chrysippus, Amauris ochlea, and Tirumala petivera butterflies at PA-baits in Kenya. Researchers hope a new citizen-science effort will increase the monitoring of monarchs at sources of PAs and provide much-needed information. (Images courtesy of Michael Boppré, Ph.D.)