An unkindness of ravens

Rocket: What is that racket!

Greg: That my friend is an unkindness of ravens!

Rocket: What are you on about?

Greg: A flock of ravens is called an unkindness of ravens.

Rocket: Really?

Greg: Yeah and a flock of crows is called a murder of crows.

Rocket: Gulp! Sounds terrible!

Greg: Why; you don't like ravens?

Rocket: Naw! They steal my food!

Greg: I see, and what do you call it when a bunch of tree dwelling rodents eat from my bird feeders?

Rocket: Well I don't know about the others but I call it lunch!

Greg: Well what do you call a big unruly mob of squirrels?

Rocket: I call them my In-Laws!