WTF?! Friday PLUS Trivia: Multitudes

The WTF? portion of this post is pretty quick: can someone please tell me who or what a "Justin Bieber" is, and what one is used for? I don't understand. I suspect this is because I am old. Does not mean that I can't appreciate this website (MOM DO NOT CLICK AT WORK OR PEOPLE WILL THINK YOU'RE WEIRD), even though it does not do much to help relieve me of my Bieber ignorance.

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And now, trivia. Inspired by the research I did yesterday, when I was trying to find the plural noun for ducks. I had always thought the word for more than one duck was different than "badling." I went through this phase where I was really into knowing the specific words for animal groups, for some reason -- I believe there may have been a mid-80's-style Banana Republic T-shirt involved at one point -- and I even got a book about it for Christmas not that long ago. Fascinating read, if you are a humongous nerd, as I am.

Anyway: can you answer the following?

1. Three names for groups of four-legged farm animals
2. Three names for groups of wild cats
3. Three names for groups of insects
4. Three names for groups of forest or woodland mammals
5. Three names for groups of primates
6. Three names for groups of animals you might see on a safari (not wild cats)
7. Three names for groups of reptiles or amphibians
8. Three names for groups of sea animals (not waterfowl)
9. Three names for groups of waterfowl or seabirds
10. Three names for groups of other birds

Standard trivia rules apply: to wit, no Google and no cheating. This went up late, so I'll post my answers on Tuesday 5/18 after 5pm. Good luck!

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Edited 05/20/10 @ 2:05 PM: My answers are posted in the comments. Sorry for the lateness! Am slackass.