Mum, are there white birds?
You mean like swans?
No. Swans and gooses are just ducks. They are not birds.
Yes, they are birds. Owls are birds too.
No. Owls are not birds. Birds can only come out in the day, and owls come out at night.
What are they, then?
Swans and gooses are ducks, and owls are not birds.
But we looked at the Observer Book of British Birds, and it had swans and geese and owls in it. So they must be birds.
No. That book is wrong.