Mirrors are often used to test whether or not an animal has self-awareness.

Humans – as well as some dolphins, elephants, chimpanzees, and magpies – seem to be enamored of their reflections for the most part. But for other animal species, it depends on the individual.

For example, some cats and dogs couldn’t care less about their reflections while others are obsessed.

When an animal doesn’t understand a mirror, that doesn’t mean they’re not intelligent. It just means that they’re not able to think of themselves as something that can be reflected back by another object.

It’s fascinating research if you want to take a look, but have a peek at these 50 photos first to see some real reactions from different pets.