DescriptionDanaus plexippus 3rd Instar.jpg English: A monarch butterfly caterpillar (Danaus plexippus) in it's 2nd week of life, feeding on tropical milkweed...
DescriptionJust Moulted (8381901349).jpg This Monarch caterpillar, now 3rd instar and 13mm long, has just shed its old skin which it had outgrown. Within...
DescriptionMonarch larvae.JPG English: 3rd or 4th instar Monarch larvae, probably 3rd. Date 8-3-2009 Source Own work Author Forehand.jay...