Stock Photo: A frontal view of the head of a 5th instar Monarch Butterfly Danaus Plexippus caterpillar larva, Ward Pound Ridge Reservation, Cross River, Westchester County, New York, USA

Stock Photo: 1566-1133623 A frontal view of the head of a 5th instar Monarch Butterfly Danaus Plexippus caterpillar larva, Ward Pound Ridge Reservation, Cross River, Westchester County, New York, USA