English has its share of quirks, and one of them is the many collective nouns. I've learned about them mostly because of their use for groups of animals - a herd of horses is rather tame, but what about a pride of lions or a murder of crows?
If you'd like to amuse yourself with some light reading about collective nouns, you can find an article about them here. And a list of many different collective nouns for diverse animals here. And now please excuse me - even though our household clowder of cats only consist of one single dame, I am getting admonished that it's time for a snack and a cuddle...