A Collection of Slightly Unusual Collective Nouns (Part 1)

What is a collective noun? 

1. A bale of turtles

2. A murmuration of starlings

3. A parliament of owls

4. A pandemonium of parrots

5. An ostentation of peacocks

6. A bloat of hippopotamuses

7. An ambush of tigers

8. A mustering of storks

9. A crash of rhinoceroses

10. An intrusion of cockroaches

11. A coalition of cheetahs

12. A pride of lions

13. A wisdom of wombats

14. A troubling of goldfish

15. A school of fish