Parliament? Clowder? Ostentation? Covey?

I was looking through some material on English idioms today, and I found all these words about animal groups...definitely have never heard some of these before, have you?  

A Gaggle of Geese. A School of Fish. A Troop of Kangaroos. A Flock of Sheep. A Pride of Lions. A Pack of Wolves. A Herd of Elephants. A Parliament of Owls. A Swarm of Bees. A Colony of Ants. A Plague of Locusts. A Cast of Hawks. A Clowder of Cats. A Drove of Cattle. An Ostentation of Peacocks. A Covey of Quail.