All insect orders

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Hemiptera (true bugs). Needlike sucking mouth

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Lepidoptera (butterflies, moths, skippers). Scaly wings and long mouth parts

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Coleoptera (beetles). No forceps (cerci), pincer like mouth, and no hindwings visible

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Plecoptera (stoneflies). Cerci present and two tarsi segments

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Orthoptera (Grasshoppers and crickets). Hindlegs for jumping. Femur larger than tibia

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Dictyoptera (Cockroaches, mantids and termites). Femur is the same width as tibia. Thin legs for running

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Zygentoma (sliverfish). Body is very flat. Eyes are small and far apart

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Trichoptera (Caddisflies). Hairy wings

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Mecoptera (scorpionflies). Snout like mandiables, fore and hind wing sim size, and lots of veins on wings

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Hymenoptera (bees, wasps, ants and sawflies). Head not prolonged. Fore wings larger than hind wings

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Megaloptera (alderflies, dobsonflies, and fishflies). Hindwing broad at the base. Mandibales orientaed forward

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Thysanoptera (thrips). Tube like body, assymetrical mouthparts and large eyes with 3 simple eyes bettwen them

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Psocodea (booklice, barklice). Enlarged swollen area at the top of the head (postcylpeus), narrow neck and tarsi 2-3 segements.

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Collembola (springtails). Fork like appendage called a furcula. Collophore: tube-like projection of the 1st segement of the abdomen. No wings.

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Siphonaptera (fleas). Hind leg quite a bit longer than frontleg. Covered in backward pointing bristles. Lateral compressed body

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Phthiraptera (true lice). Wingless, blood sucking, piercing mouthparts, flat, hook-like claws

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Phasmatodea (stick insects). Ressembles a stick. Short prothorax. 5 segemented tars with toe pads

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Archaeognatha (jumping bristles). 3 tails ( 2 cerci smaller than central). Eyes close together. Overlapping scaly body.

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Dermaptera (earwings). Pincers. Elongated, narrow.

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Diptera (true flies). Front wing is fully developped, hind wings are haltered (small buds)

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Odonata (dragonfiles and damselflies). Hind and forewing the same size.

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Ephemeroptera (mayflies). Smaller hind wings, long cerci (3 tails)

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Zygoptera (damselflies). Round eyes that are seperated. Slender body.

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Neuroptera (lacewings, antilons, and mantidflies). Mandiables directed forward. Hindwing narrow at the base.

What is the order? Defining characters

Anisoptera (dragonflies). Eyes large and oblong. Body stout and bulky. Wings speraed at rest