- Angel insect - Zoraptera
Angel insects are small white insects that are not often encountered but can be found in rotting logs. They are in the order Zoraptera. There is one species in the USA.
- Ant - Hymenoptera
Ants like this one, along with bees, wasps and sawflies belong to the order Hymenoptera.
- Aphid - Homoptera
Aphids like these, along with cicadas and scale insects belong to the insect order Homoptera.
- Barklouse - Psocoptera
Barklice and booklice may be winged or wingless and belong to the insect order Psocoptera.
- Bee - Hymenoptera
Bees, wasps and ants belong to the order Hymenoptera.
- Beetle - Coleoptera
Beetles outnumber all other animal species on earth and they belong to the order Coleoptera.
- Bug - Hemiptera
True bugs like stink bugs and their relatives belong to the order Hemiptera.
- Butterfly - Lepidoptera
Butterflies, moths, and their caterpillars belong to the order Lepidoptera.
- Caddisfly - Trichoptera
Caddisflies resemble moths but do not have "powder" on their wings. They are aquatic as larvae and belong to the order Trichoptera.
- Centipede - Myriapoda
Centipedes are not insects, but rather belong to a related group in the Myriapoda (many legs).
- Damselfly - Odonata
Damselflies and dragonflies belong to the order Odonata.
- Dipluran - Diplura
Campodeids have two long tails while Japygids have small pinchers. Both belong to the order Diplura.
- Dobsonfly - Megaloptera
Ferocious as they look, dobsonflies are harmless. They belong to the order Megaloptera, along with fishflies and alderflies.
- Doglouse - Phthiraptera
While there is some disagreement on the exact methods for categorizing them, lice like this dog louse may be considered to belong to the order Phthiraptera (includes all lice) or separated into Mallophaga (just chewing lice) and Anoplura (just sucking lice).
- Dragonfly - Odonata
Dragonflies and damselflies belong to the order Odonata.