cocoons of butterflies, pupa of insect.

butterfly cocoon caterpillar chrysalis stelenes transformation siproeta pupa malachite hatching background tropical pets pet insect abdomen species entomology butterflies development bug larva exotic nymph metamorphosis nymphalidae breeding larvae insects metamorphic bugs caterpillars nymphs metamorphism cocoons cycle specie pupation chrysalises cyclus entomoculture holometabolism keeping silken siproeta stelenes