Connecting tags to category

Hi,

Is it possible to connect tags with a category? So if I start a new discussion, people can first choose a category and choose the tags which are connected to it?

For example:

Category: Birds
- Seagull
- Owl
- Crow

Category: Pets
- Cats
- Dogs
- Rabbit

So if I choose birds, I can't choose for the tag 'Cats' because that would be weird.

Or something similiar to this would be great too.

Regards!