title: CONSERVATION BIOLOGY. Monarchs pose a puzzle.
authors.forename: Emily
authors.initials: E
authors.lastname: DeMarco
mesh_terms: D025041:Animal Migration; D000818:Animals; D001947:Breeding; D002080:Butterflies; D003247:Conservation of Natural Resources; D005260:Female; D008800:Mexico; D057048:Plant Nectar; D011153:Population; D012621:Seasons; D014481:United States
chemical_list: D057048:Plant Nectar