Butterflies actually have transform in a Chrysalis rather than cocoon. It takes seven to ten days later the monarch pushes open the chrysalis. The difference in time depends on temperature....
Silkworms take about 2-10 days to hatch after being taken out of refrigeration or other cold storage. The eggs turn a light gray color a day or two before hatching. the silkworms can be yellow and...
this depends on what silkworm you have. they can be medium sized moths to very large moths. the larger they are the longer it usually takes. anywhere from 1 hour to around 3 hrs.