Kingdom of Knuffel

You have an owl

Your familiar is a pigeon.

You have a bat, another one.

Your familiar is a gruff looking Woodchuck (grumpy but cuite!)

You have a pogona -but it can fly.
No one knows why.
It doesn't appear to be magical.
It never had a chance to get into your workshop and drink any of your potions.
It's not a spirit animal, it doesn't have a special bloodline.
It's an ordinary, mundane bearded dragon lizard.
Except it flies.

Your familiar is a horse

Congratulations, you are the proud partner of a Giraffe familiar.

Bit of an expensive upkeep on that one, but what can you do? You cast the spell to call your familiar, and a giraffe showed up.

At least it's cute.

And how many people can pet a giraffe as much as they want to?

I think your familiar is just an imaginary friend of yours, sometimes it's a cat, other times its a beaver; it'll change according to your mood!

What kind of familiar does a high-level Seraphim need?
Huh.
This is a stumper!
Okay, let's see.

You have a psychopomp of some sort. Uh. Hm. That's a category not a species... oh! I played an RPG once where there was a psychopomp called a "nosoi".
I don't know if that's a thing outside of the RPG, but whatever, that's your familiar now.

Your familiar is a Dinosaur.