I was doing a crossword puzzle today and I came across this clue. (3 letters) "a group of kangaroos". Huh. I didn't know it, I had to cheat and look it up.
As I was doing so, I came across a couple different pages dedicated to collective nouns. (Those being the terms to define groups of anything). I will admit to being entertained by this for quite some time. I have always known some odd ones, a murder of crows, a convocation of eagles, a shrewdness of apes; but I had no idea there were so many oddities to choose from. If you are curious, a group of kangaroos is a mob.
Here are 10 of the best I came across: an ambush of widows, a business of ferrets, a coalition of cheetahs, a dazzle of zebra, an exaltation of larks, a kaleidoscope of butterflies, a shimmer of hummingbirds, a troop of mushrooms, a troubling of goldfish, and an unkindness of ravens.
However, my personal favorite is: a group of librarians is known as a Shush.
Beat that, I dare you.