Collective nouns are words that refer to a group of people, animals, or things. Some examples of collective nouns are:
* People: crowd, team, family, committee, jury
* Animals: flock (birds), herd (cattle), pack (wolves), swarm (bees)
* Things: fleet (ships), bouquet (flowers), bunch (grapes)
The verb "hover" describes the action of remaining in one place in the air, typically by flapping wings or using some other method of propulsion.