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MHS Library | Life Science


Worms are elongated invertebrates that can generally be divided into three groups, including flatworms, roundworms and segmented worms. Most worms have bristles or fins that help them move.


Arachnids have four pairs of jointed legs, two body sections and simple eyes. Arachnids are aggressive predators and include spiders, scorpions, mites and ticks.


Cicadas are part of the Insect Class and within the order Hemiptera. Cicadas do not bite, but they are noisy insects. Some produce sounds up to 120 dB at close range.


While most insects have four wings, flies are two-winged insects that are part of the Order Diptera. Flies are found all over the world, even in Antarctica.

Ants, Bees & Wasps

Ants, bees and wasps are all part of the Insect Class and within the Order Hymenoptera. Most ants, bees and wasps have two sets of wings and undergo a complete metamorphoses from egg and larva to adult.

Butterflies & Moths

Butterflies and moths are part of the Insect Class and within the Order Lepidoptera. Wing colors can vary depending on pigments in the scales of their wings and can be used for camouflage or attracting a mate.


Beetles are all part of the Insect Class and within the Order Coleoptera. There are more than 350,000 species of beetles worldwide; this makes up about 40% of known insects.


Bugs often creep people out, but they are truly quite amazing animals. Learn all about the biology of bugs in this section.

Locusts & Grasshoppers

Locusts and grasshoppers are very similar, and both are within the Order Orthoptera. Grasshoppers can make clicking sounds by rubbing their hind legs against their abdomen or forewings.