Adenotrophic viviparity – A type of insect birth where the female keeps the baby inside and feeds it with special glands before it's born.
African trypanosomiasis – Also called sleeping sickness; a disease spread by tsetse flies.
Africanized “killer” bees – A hybrid bee known for being more aggressive than regular honeybees.
Almond flower pollination in CA – Honeybees are used to pollinate California’s almond crops each spring.
Ant antennae – Ants use their antennae to touch and smell their environment.
Ant feeding habit – Ants eat a wide variety of foods like plants, other insects, and sugary substances.
Ant-decapitating phorid flies – These flies lay eggs in ants, and the larva eventually kills the ant by severing its head.
Antlion larva habit – Antlion babies dig sand traps to catch ants and eat them.
Aposematic coloration – Bright warning colors (like red or yellow) to scare off predators.
Argentine ant biology – Invasive ants that form massive colonies and outcompete other ants.
Army ant biology – Aggressive, nomadic ants that hunt in large swarms.
Armyworm – A moth caterpillar that damages crops by eating them in large groups.
Biting midges / nonbiting midges – Tiny flies; some bite (and cause irritation), some don’t.
Blackflies – Small biting flies found near rivers; females suck blood.
Blackfly and disease – Blackflies can spread river blindness, a serious disease.
Blackfly biology – Lay eggs in flowing water; females feed on blood.
Blow flies in forensic entomology – These flies are often the first to show up on dead bodies, helping estimate time of death.
Bombardier beetle defensive strategy – Shoots hot chemicals from its rear to scare off predators.
Book lung – A lung structure used by some arachnids (like spiders) to breathe.
Cabbage butterfly – A common white butterfly whose caterpillars eat cabbage and related crops.
Cabbage looper – A caterpillar that moves in a looping motion and eats leafy crops.
Caddisfly – An insect whose larvae build cases out of sand or plant parts in water.
California dogface butterfly – The state butterfly of California, with dog-shaped patterns on its wings.
Canine heartworm – A disease in dogs caused by worms spread by mosquitoes.
Cardenolide – A toxic chemical found in milkweed that some insects use to protect themselves.
Carrion beetle – Beetles that eat dead animals and help recycle nutrients.
Casemaking clothes moth – Larvae make a silk case and feed on wool or clothes.
Characteristics of Insecta – Three body parts, six legs, usually wings, antennae, and exoskeleton.
Characteristics of Lepidoptera – Butterflies and moths; they have scales on their wings.
Cochineal – A scale insect used to make red dye.
Colorado Potato Beetle – A major crop pest that eats potato plants.
Corixidae respiration – Water bugs that trap air bubbles for breathing underwater.
Crane fly biology – Looks like a giant mosquito but doesn’t bite; adults live briefly.
Cryptic coloration – Camouflage; helps insects blend in with their surroundings.