Note: Wikipedia has a more complete and scholarly list of names here. The collective noun for a group of giraffes is a tower of giraffes. The different words like the herd, array, and group are some of the commonly used collective nouns for the groups or things. Does the European right at large oppose abortion? Did "music pendants" exist in the 1800s/early 1900s? Tuning the lowest bass string a hair flat. What is the collective noun for “clouds”? which was executed with almost military precision. What does it mean when people say "Physics break down"? But elsewhere I see a tower of giraffes. What's going on here is that the teacher is engaging in the game of venery, which is just a fancy way of saying "making up names for groups of animals".
How to use the Prime Number Theorem in order to prove Selberg's Formula?
This is a listing of every animal congregation I could find after scouring the web.