Cocoons and chrysalises are terms that are used during the developmental stages of insects like butterflies and moths. These insects have four different stages of development, and Cocoons and chrysalises are terms used to explain some things about the developmental stages of butterflies.
Cocoon is the silky protective case produced by the larvae of some insects like butterflies to act as a guard and protect the insect during the pupa stage of development. Chrysalis, on the other hand, is another term which can be used for the pupa stage of development in insects.
At the pupa stage, an insect is ready to develop fully into an adult stage. It comes in between the larvae stage and the adult stage. The silk material produced by the larvae is woven, and it is attached to a leaf and other things that can serve as protection for the insect at the pupa stage.
To be able to differentiate between moths and butterflies which belong to the same order “Lepidoptera,” taxonomists have classified butterflies under the sub-order “Rhopalocera,” while moths are classified under the sub-order “Heterocera.” The two flies undergo the same stages of growth; from larva to pupa, and metamorphosed into an adult butterfly or moth. These two insects, though looking similar, have several differences. One; moths have thick feathery antennae, while butterflies have thin antennae, and they are round at the tip end. Two; moths have a kind of dark colored wings, while butterflies have bright colored wings. Moths also have additional wing structure, the thin strand that connects the forewing and hindwing. This structure is called the frenulum. Butterflies rest at nighttime, and they are active during the day, while moths rest at daytime, but they are active at night. The moths’ dark wings serve as a protector, as it helps them to camouflage from predators at night. Moths have a stout and hairy body parts; while butterflies have smooth abdominal and thin thoraxes body structure.
The measurment of the first instar of the larva is 1mm