June 24, 2020 by MGNV WebmasterAsclepias_syriaca_Leaves-3_Monarch_Caterpillars_Sep_ELM_800 Monarch caterpillars on host plant Asclepias syriaca Photo © Elaine Mills About MGNV Webmaster Previous Post: « Asclepias_syriaca_Leaves-3_Monarch_Caterpillars_Sep_ELM_800