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Monarch Vocabulary

Abdomen the last of an insect's three main body parts on which spiracles and reproductive organs are located.

Annual a plant that lives one year only.

Antennae sensory organs located on an insect's head used mostly for smell and hearing.

Chitin substance produced by an insect which hardens and forms its exoskeleton.

Chrysalis the pupa, or stage of a butterfly's life cycle between larva and adult.

Compound Eye ">eye composed of many units, each with a lens or facet.

Cocoon the silken case spun by many moth larvae as a protection for their pupae.

Cremaster the hook-like process on the end of a chrysalis that attaches the pupa to the stem, twig, etc.

Entomology the study of insects.

Exoskeleton supporting structure on the outside of the body of insects and other invertebrates.

Frass the solid waste droppings of a caterpillar.

Head the first segment of an insect's body on which eyes, mouth, and antennae are found.

Instar the period between two molts.

Larva the immature stage in metamorphosis between the egg and pupa (plural: larvae). Butterfly larvae are referred to as caterpillars.

Lepidoptera "scaley wing"—the order, or classification group, to which butterflies and moths belong.

Mandible mouthpart (jaw) on the head of the larva and some adult insects.

Metamorphosis the process by which an animal changes in size and form during development.

Molting process of shedding old exoskeleton to make way for new.

Nectar the sweet liquid produced by plants which some insects drink.

Palp sensory appendage on the head used like a tongue. (plural: palpi)

Perennial a plant that blossoms annually; continuous; undying.

Pesticides chemicals used to poison insects or other pests.

Prolegs "false" legs on abdominal segments of larva.

Proboscis structure like a drinking straw used to suck up nectar or other fluids.

Scale shingle-like covering on the membrane of the wing that gives butterflies and moths their colorful patterns.

Spinneret organ on the bottom of the larva head used to spin silk.

Spiracles holes along the side of an insect's body through which it breathes.

Tentacles sensory organs found at the front and rear of the Monarch larva, also called filaments.

True legs appendages located on the thoracic segments of a larva.

Thorax the second body segment of an insect, between the head and abdomen, on which wings and legs are located.

Vein a thin, mostly hollow structure in the wing.

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