Photo 52243895, (c) Janet Novak, some rights reserved (CC BY-NC), uploaded by Janet Novak

Attribution © Janet Novak some rights reserved Uploaded by jenovak Source iNaturalist Associated observations Photos / Sounds 2 photos What Black Swallowtail (Papilio polyxenes) Observer jenovak Date September 23, 2019 02:47 PM EDT Place W Willow Grove Ave, Philadelphia, PA, US (Google, OSM) Date Added September 23, 2019 02:49 PM EDT Description Feeding on cultivated Zizia aurea 2 IDs Research Grade View Sizes small medium large original