The mirror test assesses whether animals can recognize themselves in a reflection. Not all intelligent animals pass this test, indicating it may not be a definitive measure of intelligence.
Only a few species, such as certain primates, dolphins, elephants, and even a horse, have successfully recognized themselves in a mirror.
Critics argue that the mirror test may not be entirely accurate in gauging animal intelligence as it overlooks other senses like smell, and not all animals react to reflections the same way humans do.