Not a Dinosaur

I'm reading a bedtime story to the kids. There's a picture of a Pterosaur in one of the pages.

Vian: That is not even a dinosaur.

I am quite proud that he know that Pterosaurs are not Dinosaurs.

Me: Oh, what are they?

Vian: They're just grown-up chickens in the sky.

Sempi: Argh! They're called Pterosaur, Vian. Ugh!

Vian likes taunting his brother, so he repeats his flying chicken theory one more time for good measure.