Then there is the third axis, intelligence. To continue your chain:

Eurasian magpies are conscious, but also know themselves in the mirror (the "mirror self-recognition" test).

But yet, something is still missing.

The mirror test doesn’t measure intelligence so much as it measures mirror aptitude. It’s prone to over fitting.

Exactly, it's a poor test. Consider the implication that the blind cant be fully conscious.

It's a test of perceptual ability, not introspection.

What's missing?