A collective noun is a noun that refers to some sort of group (or collective).

Collective nouns are normally not treated as plural, even though they refer to a group of something:

• My family is very bizarre.
• Our team is kind of good, but we need to practise more.

Have a look at some special "groups" and how to talk about them:

Collective noun	Animals it's used for
a brood of	Baby animals such as chicks or insect larvae
a flock of	Animals guided by a leader (e.g., sheep following a shepherd) or assembled in a formation (e.g., birds)
a herd of	Animals (e.g., cows) kept by farmers in a large group, or wild animals that congregate in groups

Do you know (or can you guess) which collective noun is used with these animals?
Try it here.