Monarch – Chrysalis Encased
The caterpillar ceased eating on the morning of day 15 post hatch. It migrated to the highest position afforded to it, then spend all day looking for an attachment point and maneuvering into position. Early on day 16 it entered the “J position” and molted the outer skin one last time forming the chrysalis. The caterpillar progressed from a 53.9mm 5th instar to a 25.4mm long chrysalis. Depending on temperature the butterfly will complete metamorphosis and eclosion in about 11 to 15 days.
Looking at the closeups you can see a line dissecting the 8th abdominal sternite which is only seen on females. In the image below the line is circled.
- Lepidoptera (Butterflies and Moths)
- Danaidae (Milkweed Butterflies
- Danaus plexippus
Scrabble & Scrabulous Ammo
- Emergence from concealment; spec. in Entymology, the emerging of an insect from the pupa case, or of a larva from the egg. From the French word éclosion, the action of éclore, which is to open. —OED