* Common noun: Refers to a general type of person, place, or thing. "Parrot" refers to a specific type of bird.
* Abstract noun: Refers to an idea, concept, or quality. Examples: love, freedom, happiness.
* Collective noun: Refers to a group of people, animals, or things. Examples: flock, team, herd.
While you could use "flock" to describe a group of parrots, "parrot" itself is not a collective noun.