Metamorphosis Butterfly

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by michaelagarbarova
Last updated 5 years ago

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Discipline:
Science
Subject:
Cycles & Processes
Grade:
8,9,10,11

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Metamorphosis Butterfly

Metamorphosis

Every butterfly begins its life as an EGG. Female butterflies are very picky about where they lay their eggs! This is because caterpillars are very picky about what they will eat! Each species of butterfly will only eat a single plant (or group of closely related plants) as caterpillars. This particular plant that a caterpillar must have is called the HOST PLANT for that species of butterfly (or moth).

When a butterfly or moth larva (also known as a caterpillar) first hatches from its egg, it is very small! This young caterpillar is referred to as a FIRST INSTAR caterpillar. A caterpillar has only one job: to eat! Many species of caterpillars begin their feast by eating their egg shell, which contains plenty of nutrients. Other species of caterpillars immediately begin eating the tender, small parts of leaves.

After approximately 10 to 14 days as a chrysalis, the butterfly is ready to emerge. When the butterfly emerges from its chrysalis, its wings are small and wet, and the butterfly cannot yet fly. The butterfly must pump fluids from its abdomen through the veins in its wings, which causes the wings to expand to their full size. Next, the wings must dry and the butterfly must exercise flight muscles before it can fly.

Butterflies and moths go through the same stages in their metamorphosis with one difference.

The chrysalis (generically referred to as a pupa), is not a "resting" stage as many people think. Quite to the contrary, a lot is happening to the pupa! The body of the caterpillar is transforming into an adult butterfly! Wings are fully formed (the beginnings of the wings were actually forming underneath the caterpillar's skin before its last molt) in the chrysalis. Antennae are formed and the chewing mouthparts of the caterpillar are transformed into the sucking mouthparts of the butterfly.

The third instar caterpillar also eats and grows until it is too big for its skin. It molts again, and the caterpillar with its new skin is referred to as a FOURTH INSTAR caterpillar.

Sources: http://www.butterflyschool.org/new/meta.html


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