A group of insects is commonly called a swarm, colony, or horde, depending on the specific type of insect and their behavior.
Social insects are insects that live in large, organized colonies with overlapping generations, division of labor, and cooperative care of the young. Examples include ants, bees, wasps, termites, and some species of beetles. These insects exhibit complex social behaviors, communication systems, and caste systems.
An insect that starts with "O" is an "ant." Ants are social insects that live in colonies and are known for their division of labor and cooperation within the colony.
One common insect in California that lives in the dirt is the California Harvester Ant. These ants create large underground colonies and forage for seeds on the ground surface. They are known for their distinct red color and aggressive stinging behavior.
The insect you are referring to is the periodical cicada. They spend most of their lives underground feeding on tree roots, then emerge in large numbers to mate, lay eggs, and ultimately die after about a week. This lifecycle can last either 13 or 17 years depending on the species.
Termites.
A solitary insect lives and hunts by itself. I does not have a social structure or a colony of any kind.
A swarm of insect
An ant is a small insect that usually lives in a complex social colony. It is wingless except for fertile adults. Ants are well known for being industrious.
It is a group of insects all together.
It could be a nest or hive.
Dragonfly
A colony of rats lives in her hair.
bee
Firefly
Hornet
ant